Alissa moans softly as she slides her puffy lips up and down my stiff member. With minimal required effort on her part, she's taking me from the swollen tip all the way down to the girthy shaft as she idly plays with her clit inside of her yoga pants. She's bent over, giving me a great view of her C-cup cleavage and ample ass sticking up in the air behind her. She slides all the way up my cock, finally releasing it with an audible pop. She looks up at me, and speaks while slowly stroking my slobber covered shaft.

"You still thinking about Susan?", she laughs lightly, "I wanna see her do this to you", and with that she slides her mouth all the way down my cock and starts tonguing my balls from the under side.

My girlfriend is talking about my busty sister, Susan. About a week ago, my girlfriend and I got a little too hammered, and started sharing secrets. It started out innocent enough, both of us describing guilty pleasure musicians and the like. I don't keep much of anything for her, especially now, but it finally slipped that I have had a thing for my older sister for some time now. Alissa's eyes lit up like a Christmas tree at this comment, and she started probing me with tons of questions, most of which are sexual. I told her I'd never, nor would I ever, admit it. It started as what I thought would be a passing thought, but soon I was thinking about Susan most of the time when I was jacking off, looking up "step-sister" porn, finding porn stars that looked like her, and reading incest themed erotica. I even told my girlfriend I started talking to her in the first place because she looks kind of similar to my older sister. She really does, my sister has much bigger tits and blue eyes, but otherwise they could be doppelgangers if they really tried to dress and act like each other. My sister dresses like a "scene kid-lite" as I would say to tease her, while my girlfriend usually dresses like your typical college freshman.

Instead of finding it weird or getting mad like a normal person, my nymphomaniac girlfriend absolutely became obsessed with my little kink. She's offered to dress up like her, she called me "little bro" last time we were properly fucking (which made me cum like a fire hose), she's gotten a bit flirty with my sister, and she's even offered to help me fuck her. Obviously, this is just a thing between us two, my sister wouldn't agree to something like that in a million years.

Meanwhile, I've noticed Alissa has stopped with my entire cock in her mouth for some time now, not moving at all. I lean back and brush her hair out of the way, and notice she's not moving at all. Concerned, I pull her up off my cock, and her mouth is still in the "O" shape it was when engulfing my dick. What the hell is she doing? Her eyes are closed, and she's not breathing!

Panic sets in, and I roll her off of my softening dick. I shake her, shouting "Baby?!" over and over. Unsure of what to do, I rush out of the room, seeking my mother who works as a nurse. As I enter the upstairs hallway of our two-story home, I see Susan walking down the hall. Or, more accurately, mid-stride and frozen in front of the stairs as if trying to mime something. The fuck is going on? I shout to her with no response, and shake her like I had my unmoving girlfriend a minute ago. Besides some wobble in her massive tits, I get nothing from my older sister as well. Her eyes are open, but she's just staring off into space, clearly not responding to any of my efforts to get her attention. There's no way this is some kind of elaborate prank.

I rush past her and down the stairs, careful not to knock her over. I skirt the corner and find my mother, Anna, likewise frozen in front of the stovetop preparing dinner. I shake her as well, her massive ass jiggling and her apron flowing lifelessly in the still air of the kitchen. I notice the fire under the skillet is frozen as if it were made of some kind of fiery ice. Is time frozen? How did this happen? What is even happening?! I notice my cock is still out, so I stuff it in my pants before grabbing a seat at our wooden dining table. I could almost cry right now I'm so freaked out.