."Very nice Carol...." I said, in a rather strained voice, trying to avert my gaze..."You have a very nice bum too..... must be all that running you d...o....." said Carol, very coyly. In those days, I did have a 'nice bum' as I did about 8 miles running/jogging everyday. She wandered over to me and grabbed my left bum cheek. I was 'somewhat surprised'....."Mmmmmmmm..... now that IS nice......" she said as she took a firm hold of my buttock. "NIkki says that's not the only thing that's nice and. He allowed her a few moments to get accustomed to his length before he began to slowly fuck her with strong insistent strokes. Each thrust pushed her a little further up the body she was lying over and before long her tits were sliding back and forth over the black cock which was wet with her saliva. She liked that idea, the thought of giving a ‘titty fuck’, something else she had seen on a porn site. She took her hands and squeezed her breasts so that they enveloped the cock which was becoming. Even then, she'd only crept in to give me a quick blowjob, just to take the edge off and let me get at least one night of good sleep. It was telling that even though no one was really in the mood for sex, my little sister loved me enough to do something solely to make me feel better.The thing with sibling sex is that it only happens when all other needs, wants, and desires are taken care of — when there's nothing else to worry about. Sibling sex isn't about maintaining or building. I realized we were going to her house. I asked her why and she said she had a personal question. She asked if I liked to be dominated by a female and I said sure.Immediately, her hand was in my pants, her fingers wrapping around my penis. She gave a hard tug and pulled my penis out. She rubbed her red fingernails on my penis shaft, digging into the skin.She leaned close to my car and whispered, “Do you like BDSM and femdom?” I said yes, my penis getting erect in her hand.She said good and she.