I live with my step-brother even if we have separate lives. It's cheaper and I feel comfortable with my step-brother because I know him so well. Even so, there is a sexual tension between us, I felt this long ago and acknowledged it. I was doing my daily aerobics wearing leggings and a Bouncy Sports Bra but my step-brother had nothing better to do than watch me and tell me what other exercises I should do. We began playing Simon Says, but this time things turned quite hot for the both of us! First he asked me to do some jumping jacks or running so he can watch my tits bounce along, after that I invited him to check on my ass which I consider being too flat and, he, like a jerk slipped a finger down to my pussy! It made me wet instantly. His boner was visible and I felt like having sex with him, no matter how forbidden and taboo is this considered. I knelled in front of him and took that big cock in my mouth...