We loved sex but we had lost interest in monogamy.During our stay with Pete and Valerie we had tried many combinations; Grace's favourite was lying on...her back with her legs spread wide, Valerie was face down, eating Grace's pussy while Pete or I (it didn't matter to Grace which) fucked Valerie from behind with long slow strokes which pushed Valerie's tongue up Grace's cunt as we pushed in and pulled Valerie back down to Grace's arsehole as we pulled out.My favourite combination was lying on my. I couldn't let her go, not now. She'd surely be frightened and run, telling the neighbors thinking I had intentions of raping her. Or, worse. I couldn't have that.After a few minutes of her beating my chest until she became tired, and repeated attempts at a groin kick, she slowly settled into a tired submission. Her hands coming to rest unto my biceps, digging her claws into my biceps. During her attack, she'd ruffled her white T-shirt up above her bra. Had it actually been there, the bra, my. Get undressed.”“Don’t I get a say in this?”Paula reached for my shirt buttons and levered open the top one as she said with the assurance of a ten year old girl who knew she was in charge of the game, “No, I’m the big sister, you’re the little brother, you do what I say and I say are going to screw me.”What she said, what she was doing made me shiver with uncertainty, I wasn’t convinced I could fuck my own sister so I had to point out, “You’re pregnant, won’t sex hurt the baby?”Paula looked at. "Are you hurt?" Nimrod asks as his concern doubles. He starts to pass his hands over my body. I get tingles."No." I finally say to him, when I have enough breath back."Sit down, and eat." He leads me over to the table. It looks like they were going to start a meal and were waiting for me to get back.I sink gratefully into one of the chairs.They serve me something yummy tasting but I have no idea what it is I am so addled. Saul pours me a glass of some small beer. We sit in peace for a moment.