Say nothing

I decide not to ruin a good thing and I just stay quiet. It's not long before Megan pulls off my cock. As she does I think I hear something from Becka's side of the room and I glance over there.

"Becka didn't show up yet did she?" Megan must have noticed my glance.

"No." I answer with only the briefest hesitation.

"Boy that would have been embarrassing if she'd walked in on that, but kinda hot too." Megan says while stroking my spit slick cock as she slides up my body.

"Yeah, kinda hot."

"You naughty boy, you want your sister to watch." Megan says as she slides my cock into her wet and waiting folds.

"Oh baby, you know I'll agree with whatever you're saying when your hand is on my cock." Again I hear something from Becka's side of the room.

"That's why I love you. So should I make this fast." Megan bounces up and down on me rapidly. "Or slow, and hope your sister shows up for the big finale?" Megan slowly lifts herself up and down the whole length of my cock as she says this. Out of the corner of my eye I'm now fairly certain I see motion on the other bed. Becka appears to be upright and undulating up and down in unison with Megan. I realize she must imagining herself in Megan's position riding my cock. {if Becka sex=true}I think back to the forbidden encounter Becka and I had earlier, I remember the feel of my cock in the tight sleeve of my sister's vagina, that thought is so erotic {else}That thought is so forbidden and hot {endif}that my cock involuntarily twitches inside Megan's vagina. "Oh so you like the idea of your sister watching us? Fine we'll take this slow."

"I didn't say that!"

"Yeah but your little guy did."

"Just stop talking and ride me." I grab Meg's hips and begin thrusting up into her quickly. I can see that Becka has also picked up her pace. Meg begins to moan rather loudly, luckily because I can now hear Becka quietly grunting in the other bed. This is all to much I can't help but imagine myself thrusting up into my sister as I watch her bounce in the other bed. I feel the cum building in my balls and I thrust hard into Meg, "Ahhh!!... B...Babe I'm cumming." I hear stereo orgasms as both women cum at the same time.

Megan flops down beside me and whispers in my ear, "That was hot, we should have Becka as a roommate more often."