I had vision of them fucking. She was very sexy, with a tight body and I didn't need them overhead fucking to get me off. I often thought of her while...at my place and on many occasions had her in my mind while I fucked a girlfriend. She was hot and knew it.So time goes by and I heard them many times. Just like in younger years I would sometime rub one off. One night I was in the bathroom stroking my cock, not aware I had a visitor. The now 14 yo daughter was watch me and could take her eyes off. Oh, the predicted wide-eyed stare took place so I opened my stance a bit more. It was no secret what I was doing and he motioned to me to raise my dress up a bit.I shook my head, no, and motioned to the kitchen where our moms were. He pointed to the hallway and my bedroom and raised his eyebrows like he was asking.I nodded and pointed for him to go to my room down the hall. Then, I got up and walked into the kitchen to see how involved our mothers were, got a drink of water, then went down to. I had not realized he was staring across at me, he held my sister by her hair as he thrust away merrily into her open mouth. I was focused on his cock sliding in and out and he saw that.'Come over Mum', I was shocked as if he had been reading my thoughts, the whole sordid act had blurred the family ties bit, suddenly it was about sex and two women, sisters performing with a same man, I found myself drawn as I went over and sat beside her, the smell of the sex, her perfume and the noises. .. It feels so real" I moaned to my sister, focused on keeping my eyes closed."Mmmmmmmmmm" Jenn grunted."Should I fuck her deep?" I pleaded to her."Mmmmm-hmmm" she moaned in agreement.I shoved my cock into my twitching mother's body as deep as it would go, roughly invading her to her core and bottoming out inside her. my balls ground up against her clit and her glossy, cum-covered ass softly slapped against pelvis. I felt my cock slide into her. My sister making squelching gagging sounds in.