Becka

Knock, knock.

"Meg, it's Becka. Are you decent enough in there for me to come in and freshen up?"

Meg looks and me and smiles, then puts her finger up to her mouth, indicating I should stay quiet. "Just give me a second." I begin to reach for a towel, not really wanting to be stuck naked in the shower with a bathroom full of people. Meg, however, puts up her hand to stop me and quickly begins stripping off her own clothes. As Meg's panties drop to the floor leaving her smiling at me from outside the shower in just her birthday suit she says, "Come on in Becka."

Meg steps into the shower as the bathroom door opens. She slides the shower curtain shut before Becka can catch a glimpse of me.

"Thanks, Meg. With so many people in the house, all the bathrooms were taken."

While my sister is talking Meg whispers into my ear, her naked body pressed up against me as the water from the shower pours over us, "It was so hot last night pretending Becka was in the room, while we had sex." I just cautiously nod at her, a little thrown off by the way my wife is acting.

Meg turns her head and says to Becka, "It's no problem." She turns back to me and whispers "I think we should do it again with her in the room." Meg reaches between our wet bodies and grabs my cock. She hungrily starts to jerk her hand up and down my still hard rod. She turns back towards Becka, "What's family for?"

"Thanks, Meg."

Meg directs me around so that she is sandwiched between me and the wall. She wraps a leg around me, hand still sliding up and down my cock.

Becka keeps up her side of the conversation. "I'm glad you're so comfortable around me now."

Meg edges herself up the wall and uses the added height to angle my cock at her hot dripping pussy. She pulls my head down to hers and hoarsely says, "I know that you wish the family was for fucking," As she says this she lets herself slide back down the shower wall, impaling her whole weight down the length of my cock.

"I remember when I was young, I used to resent you because I felt like you were stealing my brother away," Becka goes on, "but I've grown up and realized really it would be better to learn to share my brother."

This is all too much for me, I begin pounding into my wife, driving her into the shower wall over and over. Meg is trying to stay quiet, but can't resist teasing me more, whispering, "Do you wish I was sharing you with your sister now? Do you wish she was in the shower now? Do you wish your cock was in your sister's pussy?" Meg seems to be driving us both crazy with this talk, as I slam up until her particularly hard she lets out a moan and shrieks, "Oh God!"