Note: I have decided to abandon this story arc. I spent a lot of time writing this chapter and hopefully someone out there will enjoy it, so I am not deleting it.

Thanks to blumontecarlo for his editing.

This is the first chapter in a story arc that will run four chapters.

As it has been a while since Ch 01 and Ch 02, a quick recap: Heather and Michael are twins and lovers for the summer. Maddie is a friend of Heather's and will be Heather's roommate at college. Michael has a full scholarship to a more prestigious university. Maddie can be mean, how mean we will see.

Everyone is over 18 years of age.

Maddie called Heather's cell phone and heard her happy voice as she answered.

"Hey Maddie, what're you doing?"

"Nothing. Jason's flying out today."

After the second speed dating party, Jason Lewis had asked Maddie out. The next evening, they had gone out to dinner and to a party at a friend's house. While at the party, they had slipped away to a bedroom and fucked. They had partied and fucked from then on. However, Jason was going to spend the next five weeks bumming around Europe.

"Michael and I are over at the Thompsons." The twins had a busy house sitting business, so Maddie wasn't surprised that they were at someone's house.

"When you're done there, you want to come over and hang out for a while? Swim and lay out? Then maybe go to a party tonight?"

Not that going to a party would be much fun with Jason gone, thought Maddie. Most of the fun of parties for Maddie was hanging with guys. If she didn't have her own guy, she loved flirting with an eye to saying "Yes" to an attractive guy who wanted to fuck her. However, everyone would expect her to be faithful to Jason.

Still, a party would be beat another boring evening home. All her parents talked about were their medical practices and her brother was an obnoxious brainiac. She was sick of her parents expressing their disappointment that she wasn't going to a more prestigious college and if her brother made one more snarky comment about how she was a stupid bimbo, she would strangle him.

"The swimming and laying out sound fun. I have some reading I want to do. I'm not so sure about the party. Do you want Michael to come over as well?"

Maddie frowned. Heather had turned serious since school had finished, doing lots of reading and not going to as many parties. She was spending a lot of time with Michael and his nerdiness seemed to be rubbing off on her.

Maddie had an idea. "What would you think about a swim workout in my pool? I'll make up a practice plan."

"That'd be great, Maddie. I've missed working out."

"Do you think Michael could run the practice? It'd be nice to have someone to guide us through the sets and he can check me out all he wants to." Michael had frequently helped out the coaches on their many swim teams over the years.

"I'll ask him, but I sure he'll say yes."

"Look, I've put on some weight since the end of school and would like to lose it before Jason gets back. Would you like to workout every day?"

"Sounds great, Maddie! Let me talk to Michael about it. I'd love to work out regularly again and we can fit the practices into our schedule of house sitting. We'll be over in like an hour."

Once the call was over, Maddie smiled wickedly to herself. She would cock-tease Michael mercilessly. He wasn't dating anyone and his only prior girl friend was Jenny Jesus-is-my-boyfriend Anderson. Maddie doubted he had ever seen Jenny's tits and was certain he was a virgin. As he was such a loser, nobody would take her cock-teasing him seriously and besides, only Heather would see her. Maddie would have a lot of fun while remaining faithful to Jason.

* * * *

Heather set the phone down. She was naked, sitting on top of the washing machine in the Thompsons' house. She hit the button to resume the wash cycle. The machine rocked gently as it continued washing the load of towels that she had thrown in. Michael was standing next to her, also naked. He slipped his finger between her pussy lips and moved it up and down on her clit. He placed his elbow on the washing machine so its vibrations would translate down his arm to his sister's clit.

"Maddie wants me to join her in swim practices at her house and wants you to run them."

"Why should I run swim practices for you and Maddie?"

"Maddie said you could check her out all you want."

"Meh."

"She'd probably feed you lunch. Her folks always have great food in the fridge."

"Better, but I'll still pass."

"If you run swim practices for us, I'll have a fitter, firmer body for you to fuck."

"Sign me up then."

Heather leaned back on her arms, arched her back and lolled her head to the side. The combination of the vibrations and Michael's finger had bursts of sexual pleasure surging through her body. In this position, her big, firm breasts were thrust out. Michael sucked a nipple into his mouth. Heather loved to have her breasts sucked on, especially while Michael was fingering her to an orgasm. Michael sucked on her nipple and ran his tongue around it.

Heather had known she would be able to get Michael to run the swim practices. One of the many changes in their relationship since they had become lovers was that she could now persuade Michael to do things for her with no promise of something in return. She had all the power in the relationship. She knew why - she could easily find another guy as good-looking as Michael but Michael would have a tough time hooking up with a girl as good-looking as she was.

Michael released the nipple and moved his mouth to the side of her tit. He smiled when he saw a small hickey there. He had given it to her to secretly mark her as his woman. He took some tit flesh into his mouth and gently sucked on it. Even though they had fucked almost every day since the family camping trip, Michael still couldn't get enough of Heather's body.

"Knowing Maddie, she's planning on cock-teasing you while you're there."

Michael shrugged. He released the tit and said, "As I'm already fucking the most beautiful girl in the world, it won't bother me." He went back to nibbling on Heather's tit.

Heather lolled her head all the way back while rotating her hips forward as best she could to maximize the vibrations she could feel from the washing machine. Big circles of pleasure spread out from her clit and smaller ones for the breast Michael was nibbling on. She had been close to cumming when Maddie had called and was getting close again.

"Keep it up, Michael. Your finger feels so good."

Michael made slow, lazy circles around Heather's clit with his finger. He was letting the washing machine do most of the work to bring Heather to orgasm. In the weeks since they had first fucked, Michael had learned the little signs that indicated how much pleasure Heather was feeling and he could tell she was close to her limit for sexual stimulation. He traced a few more circles and then Heather froze up as her orgasm overwhelmed her like a tidal wave. Michael eased his pressure and eventually pulled his hand away. He knew to give Heather a few moments to recover.

Heather hopped off the washing machine, turned around and laid the upper part of her body on it. She raised her right leg and laid it across the adjoining dryer. At 5'7", she had to tiptoe on her left foot to assume this position, but it was so worth it. In this position, her clit was pressed against the vibrating washing machine. Michael guided his cock to her cunt and buried his full-length in one easy stroke. The intense pleasure from the feeling of Michael filling her and the jolts through her clit from the washing machine made it hard for Heather to breathe.

At first, Heather and Michael made love most mornings in Heather's bed after their parents went to work. Then one morning, their Dad came home unexpectedly while they were fucking and had almost caught them. If their Dad had come in the front door instead of the garage, he definitely would have caught them. Since then, they mostly made love at the homes they were house sitting.

Michael slowly pulled almost his full length out of Heather, then slowly pushed it back in. Michael had to put his hands on the washer to lift his 5'10" body up high enough to actually fuck her. He liked going slow at first and gradually building up speed. Whenever he was fully buried in her, he too could feel the vibrations from the washing machine.

"You feel amazing, Heather. I love fucking you in this position."

Heather continued grinding her clit against the washing machine while Michael took her from behind. She had her upper body arched to keep her sensitive breasts away from the pointy knobs of the washing machine. The center of her body was on fire with pleasure. Everything above and below it was held in an uncomfortable position.

They had originally picked the Thompsons' mud room to fuck in as they felt it was the safest room in house. No one could see into it from a window and they would have time to dress if they heard someone unlocking a door. Before the first time they fucked in it, they spent a while splashing around the Thompsons' pool, copping lots of underwater feels. After they dried off, they started the towels in the washing machine as an excuse to be in the mud room. Heather had perched on top of the washing machine for Michael to eat her out, loved the vibrations and they had been using this room ever since.

"Oh, Michael. Fuck, fuck, fuck."

Michael was thrusting hard. Because his arms were holding him up, his abs had to do all the work. One disadvantage of the mud room was that air circulation was poor and they were both sweating hard. Michael missed seeing Heather's tits as he fucked her, but this position gave him a great view of her ass and long, firm leg as it was stretched out next to them. He smiled at the small hickey he had given her ass check - another secret mark that she was his woman.

"I'm almost there, Michael."

Every vibration of the washing machine sent ripples of pleasure from Heather's clit out to the rest of her body. Michael fucking her was a bonus, but what a bonus. His big cock filled her completely whenever he shoved into her. Slam! Slam! Slam! Slam! From Michael's fast pace, Heather guessed he was close.

Both of them were panting hard. Sweat was running down Michael's face and Heather's body was covered with a sheen of sweat. Michael was close to cumming. He hoped he could hold out long enough to make Heather cum again.

He felt sperm begin its trip out of his balls. At almost the same time, Michael felt Heather stiffen. He slammed into her one last time and relaxed. He shot spurt after spurt into her as waves of pleasure swept over both of them. Heather was the only woman Michael had fucked, but he couldn't imagine how it could be better with anyone else.

After his last spurt, Michael pulled out of Heather. He would have rather stayed in her for a while to savor the feel of her, but he knew Heather was ready to get down from the washing machine. He quickly dressed and then went out to the garage to feed the dogs. Heather made sure there were no signs of their love making and then sprayed Lysol to cover the smell. She dressed and went to the kitchen to fill a container for watering the plants. They both enjoyed that they were a quick and thorough team. Once the animals were taken care of and the plants watered, they locked up and drove home to get their swim suits.

* * * *

Michael turned their Mom's car on to Maddie's street. He drove their Mom to work every day so he and his sister could have transportation.

"If Maddie cock-teases me, what should I do? Act like I have never seen tits before?"

Heather made a small frown. "I'm still a little pissed at Maddie for forcing us to kiss and make out at the party."

"If she hadn't done that, we probably wouldn't be lovers now."

"Yeah, I know. But it doesn't change the fact that she was mean to both of us. It would really annoy her if you acted like her body was uninteresting to you. If she shows off her body to you, act like you would act if she were some porky girl."

Michael pulled into the large driveway at Maddie's house. Maddie's house was a two story mansion on a one-acre lot in the best neighborhood in town. Heather had been there often and led the way around to the back. Except for the party, Michael had only been there to pick up or drop off Heather.

Maddie's parents had had a huge pool put in their backyard for their kids to train in. It was fifty feet long, which was too short for competitive swimming - twenty-five yards is the minimum competitive length - but it was long enough to get in a decent number of strokes before having to turn. It was twenty-four feet wide and had the hardware for lane ropes for four six-foot lanes. It was five feet deep at one end and nine feet at the other. At the five-foot end, there was a shallow alcove with steps for small children to play and a raised hot tub next to the alcove.

Maddie was waiting for them in a one-piece competition swimsuit. As Heather stripped off her T-shirt and shorts to reveal her one-piece suit, Maddie bent over from the waist in front of Michael to pick up a clipboard, giving him a great look at her ass. Heather rolled her eyes. Michael forced his eyes on the clipboard and away from Maddie's ass.

Maddie stood up and handed Michael the clipboard. She was disappointed by his lack of reaction when she had bent over. She turned to Heather.

"I decided to begin with a 3200 yard workout and we'll build up from there."

"Sounds great. I haven't swam much since the season ended."

Maddie turned back to Michael. "Okay, you can see the sets that I have planned." She leaned forward to give Michael an eyeful of her tits. He kept his eyes on the clipboard. "When we finish a set, tell us the next one to do. If the next set is a pull or kick set, get us pull buoys or kickboards while we're doing the set before." A pull buoy was a piece of foam that swimmers put between their legs to neutralize their kicking motion so they were forced to pull themselves across the pool with their arm strokes. A kickboard was like a 20" surfboard that swimmers held with their arms so that they were forced to propel themselves with their kicks.

"Any questions?"

"I've helped at enough swim practices to know the drill. Let's start."

Heather and Maddie jumped into the pool. The lane ropes were in the pool and each girl took one of the middle lanes. They swam to the edge and looked up at Michael while holding on to the edge.

"Twelve lengths of free. Go!"

Both girls pushed off and swam freestyle towards the other end of the pool. Michael checked the clipboard and saw that the next set was Individual Medley. The girls would be swimming four lengths of the pool in each of the four strokes - butterfly, backstroke, breaststroke and freestyle.

As he had some time, Michael looked around. He saw a cooler. Opening it, he found bottles of water and Gatorade. When they got close to finishing their set, he would set a bottle of Gatorade at the end of each lane for each girl to get a small drink from. He took out a bottle of water and drank it as he watched the girls swim. Michael enjoyed watching both girls swim as both had hot bodies. Heather was a little taller than Maddie with a broader build. Both girls were muscular with firm bodies which had been toned by years of constant swimming. Both girls were wearing swim caps, but Michael knew that both of them had shoulder length hair. Heather was a strawberry blonde and Maddie was a brunette. The girls were wearing swim goggles, but Michael knew that Heather's eyes were green and Maddie's were dark brown. Maddie had been one of Michael's favorite jerk off fantasies.

Heather had pulled a little ahead of Maddie. Heather was better at freestyle and Maddie was better at breaststroke and butterfly. Heather and Maddie had always been the two best girl swimmers on their team since they had first swam together when they were eight. Any swim meet where Heather had won more races than Maddie was a good swim meet. Heather had been a little short of being good enough to get a swim scholarship, much to their parents' disappointment.

Michael had the Gatorade waiting when Heather finished her set. She grabbed the bottle and took a couple of sips. Maddie finished right behind her.

"Sixteen lengths of I-M. Go!"

Michael put the bottles of Gatorade back into the cooler to keep them cold until the end of the next set. And so the practice went. The girls could have swam the 3200 yards by swimming 192 lengths of freestyle, but Michael knew from talking with Heather about past practices that such long sets were deadly boring. Mixing things up kept the practice more interesting and did a better job of refining their strokes, but required a lot of planning.

Once all the sets were done, both girls got out of the pool and came over to Michael. Their skin was pink from the exertion, heat and sun.

"Thanks so much for running the practice for us," said Maddie. She bent forward as she continued talking. "It must have been boring for you." Maddie pulled the right side of the top of her suit forward to rearrange her right boob. "It was really sweet of you to do it." She pulled the left side of the top of her suit forward to rearrange her other boob. When Maddie looked back at Michael, she was disappointed to see that his eyes were on her face and not on her boobs. "So thanks again."

"Let's go inside and get some lunch," said Maddie. "After lunch, I'm going to change into a two-piece suit and get some sun. Heather, did you bring a suit for sunning?"

"Yeah, I did. I picked up a book on plot construction from the library, so I have something to read."

"Michael, what are you going to do?"

"I haven't gotten any exercise yet, so I was hoping to take Goldie out for a run." Goldie was Maddie's Golden Retriever.

"She'd love that. Before you go, could you put sunscreen on my back?"

The rest of the afternoon, the three of them hung out. Maddie read a book about teen vampires and werewolves. Michael read a Pulitzer-prize winning history book. Maddie and Heather would gossip occasionally. Every few pages, Maddie would tell them a summary of what had happened in her book. They frequently jumped into the pool to cool off. Whenever Maddie and Michael were in the pool together, Maddie would "accidentally" rub her body against his.

"Michael, would you please put some more sunscreen on me? The last application has to have worn off by now."

Michael knelt down to reach the sunscreen. He used the opportunity to move his hard dick to a more comfortable position while his back was turned to Maddie.

Maddie was sprawled on the chaise lounge with her top untied. Michael squirted the sunscreen on to her back and spread it around.

"Michael," said Maddie in a husky purr, "You have such strong hands." The way she said, it sounded like she was hoping Michael would take her right there in front of his sister. She pushed her body into his hands as he worked the sunscreen around, making happy groans.

"You're so wonderful, Michael."

Michael couldn't tell if Maddie actually enjoyed him applying the sunscreen or if it was all a game she was playing. Regardless, she had him rock hard by the time he was done. He jumped into the pool to cool off and shrink down.

At four, Heather said that she needed to get home to cook dinner.

Once they were in the car, Michael said, "I know we need to get home for you to start dinner, but could we stop by the Thompsons for a while?"

"Did Maddie get you all hot and bothered?"

"I tried to not let it show, but she is a great cock-teaser. I am in pain and need some release."
"You were awesome today. I could tell that Maddie was getting frustrated about not getting a reaction from you. So many times, I had to bite my tongue to keep from laughing. You deserve a reward for putting on such a great show, so how 'bout a quickie when we got home? You can pick where."

"In the shower?"

"Perfect. I need to wash my hair anyway."

* * * *

For the next five weeks, Heather and Michael went over to Maddie's almost every work day and several Saturdays and Sundays. The only week they didn't go over was the week that Maddie and her family went snow skiing in Argentina and Michael and Heather went camping. Maddie loved getting the exercise, but it pissed her off that she hadn't gotten more of a rise from Michael. She had done every trick she knew to get him hot and bothered. She had worn smaller and smaller suits for sunning until she was wearing a top that was a thin strip of material and a G string bottom. Michael acted no different towards her when she was wearing her sunning suit than when she was wearing her competition suit. He never gave her the look of lust she kept hoping to see. He seemed afraid of her. Was it because she was dating a football player? Was it because he is gay?

Another frustration was that Heather was always reading a book to prepare for college or writing a practice paper for Michael to critique. Whenever Maddie mentioned it to her, Heather would lecture Maddie on how college is going to be a lot harder than high school and they aren't going to be able to get by cramming at the last minute. Heather also told her that she wanted to transfer to Michael's university after one year as it was such a better place to be, but she knew she would have to get great grades to be able to transfer.

Jason showed up at the pool one day while the girls were doing their swim workout. Before the workout had started, Maddie had excitedly told Michael and Heather that Jason had gotten home late the night before.

"Hey, Michael." Jason stuck out his hand.

"Hey, Jason." Michael took his hand. Jason gave his hand a painfully hard squeeze.

"What are you doing here?"

"Maddie invited Heather over to do a swim workout. I tell them what is next on the practice plan."

As their current set was about to end, Michael got their Gatorade bottles out of the cooler and set them down at the end of their lanes. The girls finished their set and stopped to take a drink. Maddie saw that Jason was there.

"Jason!"

"Hey, gorgeous! Give me a kiss."

Jason knelt down and Maddie gave him a brief French kiss.

"We've about an hour to go, then we'll eat lunch. Stick around. I have plenty more kisses where that one came from."

"Descending sets of butterfly. Go!"

The girls swam off. A descending set was were the time for each set got progressively faster. For the first set, they were swimming at a moderate pace. The next set would be faster, the next set faster still and the last set would be all out.

"So how was Europe?" Michael didn't expect much of an answer as he hardly knew Jason.

"Awesome, dude. It was awesome. It was like a huge sex party. All these people our age were traveling around, looking to have a good time with anybody they met. I hooked up with girls from all over the world..."

Michael was shocked that Jason would tell him that he had cheated on Maddie. Yeah, the girls were busy swimming, but come on.

"...In Amsterdam, they have this huge red light district. At night, there were all these hot chicks dancing in windows, strutting their stuff in next to nothing. It's the hottest thing I've ever seen. There was this blonde with the tightest ass dancing in this one window. She saw that I was checking her out, so she gave me a little come-inside gesture. I went inside and fucked her. She was a hot fuck."

"Just a sec."

The girls were close to finishing their fly set, so Michael got their Gatorade out for them. When they finished, Maddie gave Jason another French kiss, and then they took off for a descending set of backstroke. Michael put the Gatorade away and returned to Jason. The whole time he was away from Jason, he was shaking his head at how much of an asshole Jason was. What had Heather seen in this guy? What did Maddie see in this jerk? His parents were rich and he had a fancy sport car, but Maddie's parent were rich too and she had a Lexus.

Jason continued telling Michael about his sexual exploits. He talked about some landmarks, churches and museums he had seen, but his attitude towards them was that they were just places to pick up girls. Maddie gave him kisses at the end of each set.

"So this is it? You stand around here forever, watching the girls swim?"

Michael shrugged. "The workouts are usually two hours."

Jason shook his head. "I'm bored. Tell Maddie I've gone home to play Xbox. When she's done swimming, have her come to my place and I'll give her a real workout."

As usual, they had lunch after the workout. Maddie was practically squealing at the prospect of being with Jason again and was going to go to his place right after lunch. Michael was conflicted. Should he tell Maddie what Jason told her? It wasn't his business what Jason and Maddie did and they both obviously wanted to fuck each other. However, he was afraid Jason might give her some incurable STD he picked up in Europe.

Michael had grown fond of Maddie. Yes, she looked down on him and cock-teased him, but she was a lot of fun to be around. She was always appreciative of what he did for her. She acted like she didn't pay much attention to him, but whenever he praised some food in the constantly changing supply in her parents' cavernous fridge, he noticed that it was always there from then on.

"Heather, could you give me a few minutes to talk to Maddie alone?"

"Sure. I'll be waiting at the car."

After she left, Maddie asked, "What's up, Michael?"

"Jason told me some stuff I think you should be aware of before you go see him. And if he told me, he has probably told other guys. If you need me to, I'll tell you word for word what he said. However, if you call the girlfriends of his buddies, you'll probably hear more than what he told me."

"I never expected Jason to be faithful to me while he was in Europe."

"It's your life, Maddie, and you can do whatever you want to do. I just think it would be wise for you to make a few phone calls before you go over, okay?"

"Okay. And thanks, Michael." She gave him a hug and a quick kiss on the cheek. "For caring."

Michael felt himself redden. Maddie had showered him with attention over the last several weeks, but this was the first time that Michael felt like she had actually meant it.

"Heather's waiting, so we'll see you tomorrow."

* * * *

"...so he bragged to all his friends how he fucked his way across Europe? And he even fucked a prostitute?" Though Michael had told her yesterday what Jason had said, Heather still found it hard to believe.

Michael was doing his usual post-lunch run with Goldie while the girls were sunning around the pool. The girls did their most serious gossiping while he was gone.

"Yeah. He started calling his buddies to brag as soon as plane touched down in the US."

"Jesus, what an ass! Did you dump him?"

"No! I've been waiting five weeks to fuck him. I wasn't going to punish myself for his fuck ups. I did make him use a condom. Jason hates using a condom. After we fucked, he told me that Friday after next is the last day he'll be in town. He and his parents are going to spend two weeks touring the Northeast before they drop him off at college."

"God, I'm glad I didn't go out with him."

When Jason had asked out Heather instead of her, Maddie had been furious. When Heather had broken the date, Maddie had been incredulous. She had gone after Jason to prove Heather had made a big mistake. So not only had Jason totally embarrassed her, she now had to listen to Heather say told-you-so.

Maddie liked keeping things simple with guys. She knew that the only reason they were interested in her was to fuck her and she was okay with that. She liked to fuck and she liked to have fun fucking. A lot of the time, that fun came from playing with guys' minds. Sometimes she let the guy fuck her after she had messed with his head, sometimes she didn't. She had tried laying a big guilt trip on Jason, but he had cut her off. Forcing him to wear a condom was the best she had been able to do for revenge.

"But you never went out with anyone else."

"I decided I didn't want to deal with the drama. And it worked out. I've had a great summer hanging with you and Michael. I'm looking forward to being roommates with you. You deserve to go out with a guy who treats you better than Jason treated you."

"It could have been worse. I could have gone out with some nerd all summer."

Heather jerked, like Maddie had poked her in the eye.

"You think Michael is a loser, don't you?"

"Yes."

"And we're winners, right?"

"Hell yes!"

"I used to think that. Then I woke up and realized that Michael is getting a free ride to the university I always wanted to go to while I am going to rack up a huge debt going to a second rate college." Heater pointed at Maddie. "And you're going to be going there too!"

Maddie had decided to go the same college as Heather as she knew lots of people there that she liked partying with. Her parents had wanted her to go to a small, expensive-as-hell private college. Maddie had had a number of fights with her parents about her choice in college until she had got her dad alone and begged him to support her choice.

"We were winners," continued Heather. "But they don't give out gold medals for being ahead after a few laps. Now, I see that Michael is way ahead of me. Michael's going to spend the next four years kicking ass and taking names. I intend to kick ass too. Winning in high school didn't prepare me to win in college, but I'm going to win there anyway."

Heather picked up her book, laid back and resumed reading.

* * * *

Inside the Kingsleys' house, Michael locked the front door as Heather went right. She was off to check that no one was home and the doors were locked. She was sick of the constant searching of people's houses, but she couldn't relax enough for sex unless she was certain they wouldn't be interrupted. She was looking forward to not having to do these sweeps, even if it meant no more sex with Michael.

Michael went left and checked his half of the house. After he had done his sweep, Michael entered the kitchen. Heather had already moved one of the wooden dining room chairs over to a corner of the kitchen that wasn't visible from any window and was taking off her clothes. By now, they had the drill down and knew exactly what each other would do. Michael walked to the chair and took off his clothes.

Maddie's constant cock-teasing had Michael ready to fuck. He had hoped she would stop once Jason came back, but if anything she cock-teased him even more. Once he was naked, Michael sat down on the chair with his legs slightly apart. Heather was standing next to the chair and once Michael was seated, she wrapped her hand around his cock and guided it into her cunt as she straddled him. He groaned as she lowered herself. Once she was fully impaled on Michael, Heather bent her head down and they kissed for a while.

"You feel so tight around me."

"You feel so good in me."

The back of the chair they were sitting on spread out in a "V" from the base and had a four inch strip of wood running across the top of the back a little below Michael's head. Heather grabbed the edges of the top strip while Michael held on to her waist. Heather's tits were right in front of his face. They were completely tanned now, though the area under her bikini was a little lighter than the rest of her body. When they had gone camping, they had shed their clothes not far up the trail and had gone "bare" the whole week. It had been a solid week of sex, in as many different locations and positions as they could think of. They had both known it was their one chance for uninhibited sex.

"You're so beautiful, Heather," said Michael.

With her eyes closed, Heather moved her hips in a circle to grind her clit against Michael's pelvic bone. Pleasure radiated up her body. She opened her eyes, smiled and said, "Today, Maddie came that close to shoving her boobs into your mouth." She gave a light laugh.

At first, Maddie's cock-teasing had made Heather jealous. When Michael had ignored her advances, the jealousy had stopped. The cock-teasing gave Michael a raging hard on, which he did his best to hide from Maddie. He always wanted to have sex after their afternoons with Maddie. Now, the cock-teasing made Heather horny as she knew Michael would give her a hard fucking once they were away from Maddie. It tickled Heather to no end that Maddie worked so hard to sow lust in Michael and that it was Heather that reaped the rewards.

"It's easy to ignore her boobs when I have perfect ones to enjoy."

"Comments like that will go to my head."

"As long as they help my dick go to your pussy, it's a risk I'm willing to take."

Michael gave her a small smile. He enjoyed flirting with her. He enjoyed being in the same room with her. Whenever he was around her, he felt like he was walking two feet off the ground.

He leaned forward and popped her left nipple into his mouth. It tasted of pool water. He sucked on the nipple for a few moments, and then moved his mouth to the left side of her breast. Before he sucked some tit flesh into his mouth, he saw a small hickey that was fading. Heather had refused to let him give her a new one. By the time she left for college in twelve days, his secret mark would probably be gone.

"Suck on them, Michael. You know how happy it makes me. Make your woman happy."

Heather went back to gyrating her hips and grinding her clit. She was in no hurry to start fucking. She loved being in control. She kept her hands on the top of the chair and leaned back to give Michael plenty of room to suckle on her breasts.

Michael kissed and sucked on her tits while sliding his hands up and down her back. She was "warm" but wouldn't be ready to fuck until she was "hot". He could feel her juices running down onto his crotch. Heather continued leaning away from him with her head thrown back and her eyes closed. Instead of speaking, she moaned. Occasionally, she gave his cock a squeeze with her Kegel muscles to keep him hard within her.

Heather shifted her body forward, which was the signal she was ready to begin fucking. She raised her body off of Michael's using her legs, then dropped herself down on Michael's dick. Michael moved his hands to cup her ass and helped her to lift herself up.

"I'm glad this is a well-built chair," said Heather.

"I wonder if they had chair fucks in mind when they designed it. Maybe I'll learn to be a chair designer and we'll test my designs for sturdiness."

"And balance." They both laughed.

Once, Heather had leaned too far back and over-balanced the chair. Michael and the chair had come crashing down on top of her. Fortunately, there had been no bruises, which would have been hard to explain. The crash had ruined the mood and they hadn't continued.

This fuck was going much more smoothly. They quickly achieved a steady rhythm. Swim workouts were boring, but whenever Michael gripped her firm ass, he felt that the boredom was worthwhile. As they fucked, Heather big tits bounced up and down inches from his face. He loved the feeling of fucking Heather in this position and he also loved the sight of her tits jiggling wildly. Michael pulled his gaze away from her tits long enough to admire her muscular upper body, which was firm and toned from years of swimming. Her skin was flawless. Her strawberry blond hair rippled behind her like crashing waves.

Fucking in a chair was a lot more work than fucking in a bed, but they didn't want to mess up any beds in a house they were looking after. Soon, they were both panting and sweating. As much as Michael liked this position, he preferred the next one. He knew that Heather's legs were too tired to let her keep this one up for long.

Heather dropped herself on him and stopped. Michael pulled his hands away from her. She stood up, letting Michael's dick slide out of her with a slurp. Michael stood up and moved the chair closer to the kitchen counter. Heather knelt on the chair with her feet apart and leaned forward to put her head on the kitchen counter. Michael moved behind her and slid his cock into her sopping cunt. They fucked doggie style on the chair.

"Fuck me, Michael. Fuck me hard."

"I always give the lady what she wants."

Michael gripped Heather's hips tightly as he powered in and out of her. He admired Heatehr's ass. It too was tanned all over, with the area under the bikini bottom lighter than the rest. His secret mark on her ass was fading and Heather had stopped him when he had tried to give her a new one.

Heather groaned in pleasure. The kitchen was filled with the sounds of Michael slamming his body into hers. Michael had already made her cum twice today and she could feel she was getting close to a third. Heather moaned loudly to let Michael know how close she was. Michael was pounding her hard, filling her pussy with waves of pleasure on every stroke. He was so good at fucking her.

"I'm cumming," she panted. Michael thrust hard a few more times, then pulled her close one final time to fill her with his cum.

"I love you, Michael."

"I love you, Heather."

They pulled apart and Heather got off the chair. Michael turned on the kitchen fan to remove the smell of sex from the room. Heather grabbed one of the wet towels from swimming at Maddie's and mopped up the sex juices on the floor and chair.

As he dressed, Michael suppressed a sigh. He had meant his I-love-you with all his heart. Lately, Heather's I-love-you's rang hollow. In twelve days, his Mom would drive Heather to her college and his Dad would drive him to his university. Their affair would be over. As neither of them had a car, they couldn't see each other during the school year. Perhaps they would resume their affair at Christmas or next summer. Or perhaps Heather would have a boyfriend by then and she would want to be faithful. The only certainty of lovemaking Michael had was the eleven days left of summer. Eleven more wonderful days.

I am trying to improve as a writer and would appreciate any detailed feedback left as a comment or sent as a PM. Thanks to all who left comments on "Cycling Weekends with Sis". After reading them, I was very motivated to write more. A huge thanks to Darkniciad for his write up of his impressions while reading "Cycling Weekends with Sis". Thanks to dinkleberry and GingerCat1 for beta-reading this story.