Move for a better view

I move to the other side of the doorframe, getting a different angle into the room. I can see Kenny sitting on the couch and Becka is climbing on his lap facing toward him. They are sideways to me, so they can't see me in the shadows by the door. Kenny has a good sized cock, about as long as mine but a little thinner. Becka expertly slots him in her cunt and drops down on him. They both groan. I whip out my johnson and stroke it.

Becka puts a boob in the teen jock's face and he sucks her nipple. My sisters humps him, her boobs bouncing as he sucks one.

"Oh, yeah! That's it! Suck it, Kenny." Becka's voice is dark with lust.

He starts thrusting hard up into her. "Oh, oh, slow down, stud! You don't want to come too soon!" she implores. Kenny ignores her, in fact speeding up. Then he lets go of her nipple and grunts loudly, holding his hips up high, obviously cumming inside her. He slumps after a few seconds.

"No! Noooo! Oh, Kenny!" she says, disappointment clear in her voice. She stops and slides off him. "Why did you do that? I wasn't even close yet."

"Your body is just too exciting. I couldn't stop," he says as he stands up. "You were a great fuck, Becka."

"What? You're just going to leave?" she says with fire in her voice.

"Yeah, I'm tired. See ya later!" he says as he pulls on his shorts and shirt, and he leaves. I hide before he gets to the door.

"You jerk! You were a lousy fuck. I hope you have no sex for the rest of the month!" she calls out to him. Then she growls in frustration as he heads deeper into the house.