He long stroked her going full hilt, his balls slapping her ass with each thrust. The sounds of their sex was primal and after a few more minutes he s...huddered and let out a loud groan as he unloaded deep inside her, the condom being the only thing stopping him from breeding her. He rolled off her on to the bed and they both spent the next few minutes catching their breath and returning to earth from their sex high.In the moments that followed I wasn’t sure what to do next. I was sitting there. I sat back and stuck three fingers up my cunt whilst I looked around.There were about twenty or thirty men in the theatre, mostly in their late forties to early fifties I would guess, though there were one or two younger ones as well. They had spread themselves out to be as far from each other as possible, but the back rows with armrests were completely empty but for one man on the far side of the room, who kept casting furtive glances over at me. I smiled at him and angled myself so he could. I left the room as well, not even looking back at my sister and I've tried not to look at her that way since. It has been five years since then and my sister and I are both fifteen and our oldest sister, Lillian, is now eighteen. “Jamie!” mom shouts and I can barely hear her over my music. I roll of bed and pull on a pair of old sweatpants. When I reach the bottom of the stairs, my mother is standing in the living room along with my two other siblings. “Am I in trouble?” I ask. “No, should. “I hate to ask”, she said, “but can we join you? There just are no other tables.”I looked up and saw tired family, mother and three kids under 6. She looked just a bit frazzled and the kids like they had had almost all the fun they could stand.I jumped up and said “Please do” as I started helping her put their food trays around the table.“You sure?” she asked.“Positive, I like little kids. I’m ready for grandkids, but my children aren’t, so I just enjoy other folk’s kids.”We introduced.