.Times we all enjoyed most was when we got a baby sitter and managed to go to James’s apartment, it seemed to give Penny even more freedom she’d s...rip off and wear whatever James had got for that night. He bought her lots, leather and rubber outfits, high heeled shoes and boots and she wore them like the perfect slut getting fucked and sucking cock in every room. Over the weeks and months there was one thing we both wanted and that was her anal cherry but that was something she didn’t want,. I spread her cheeks and I pointed my pussy soaked cock right at her asshole and pushed in sinking half my length into her at once.Her ass convulsed around my cock, and she screamed into the ottoman, and I paused horified, realizing what I had done, what I was doing.After a moment of just standing there my cock halfway in my sister's ass I felt her move, I couldn't believe it as I realized she was pushing back into me."Cum'mon, brother, fuck your little sister's tight ass. Shove that big fucking. The guy had a soppy bent and loved the old love stories. I found he always made long slow, gentle love to me afterwards, so I had no problem letting him watch them. He liked my sci-fi’s as well, and we’d have some in-depth discussions about humans’ fascination for space and weird science.At work, we had adopted the two-week system, and Paul and Foxy looked after the second away team. Some of my people still worked the half-week system and some that didn’t need to go to digs or on study. I was just enough taller than Tami that I had to squat a little to enter her, and after awhile it got uncomfortable.Though not as uncomfortable as the cold hard ground beneath us."If Orville were still around, do you think he'd be watching us?"If I live to be a hundred--and I plan to--I don't think I'll ever get a stranger question during sex."Orville didn't strike me as the voyeur type." I pulled my cock out of her pussy and leaned back enough that I could rub it against the crack of her butt,.