I wondered if her own young pussy was getting wet from the show."I bet she is getting horny watching your naked pussy." I teased."Ewww, she is my litt...e sister." Miranda complained."It's true, isn't it Patty?" I asked as I shoved my cock into Miranda's wetness.Patty glared at me. I knew it was true but she seemed embarrassed that I had outed her to her sister.Miranda moaned as I bottomed out in her. My pelvis was slapping against her round ass as I drilled her young cunt from behind. I knew. Sure Jeremy still had to tow the mark around her mom and dad, but it was all formality now. Her dad was retired. He’d been a plasterer all his life,a hard working man. He’d even helped build the house Jeremy and she bought. Her mom had worked at the grocery store. All her parent’s kids were grown and gone, but none had moved very far away. Thanksgiving had become one of those special holidays. The official Thursday was for everyone to share with their married families, but everyone, all her. As we grew up, mom would give us showers all of us together. Even in our early teens we thought nothing of Ken and I showering with mom. We never told our friends, boyfriends or girlfriends the way we showered at home. She always did the washing of us. We liked it and she really did too. She always got excited at shower time. She love to wash my tits and pussy best, and we would watch her close her eyes and enjoy it. She would wash Ken’s dick and stroke it a little, her eyes closed and. She was no beauty at five feet four, dirty blonde hair worn in a pony tail, rather skinny with an almost flat chest and long dancers legs with tiny feet. She rarely wore anything but tee shirts and shorts and dispensed with a bra as even at s*******n her tits were small. That afternoon we started telling some new dirty jokes we,d heard and as usual Darla told the filthiest jokes to get us in the mood for the magazines. We loved the stories that accompanied the silly airbrushed photos that often.