Opposite sex always creates interest but I wondered if that happens among blood relations as well.Then I remembered my friends’ stories of how their... cousins or brothers used to stare at them. Even some used to make advances as well as they say. Some of them felt uncomfortable with those advances while some of them enjoyed it. So I realized it wasn’t so unusual.One gets such feelings sooner or later but gets it at some point in time. Then I questioned myself if there is truly such a high chance. Then he started spanking my ass while he was fucking me from behind. I told him not to go to deep but he was hitting my cervix anyhow. It hurt a little but so did the slaps on my ass and his thumb in my ass but I was in heaven. Hard to explain just how full I felt. I found myself pushing my hips back onto his cock; damn he had one big cock. I wanted to change position so I could ride him cowgirl, I wanted to ride on top so I can control better how deep he went. I started to cum now and clenched. Becky gets her stuff and comes by and gives us each a kiss and a hug and heads out for work and the girls ask me, “so what do you want to do today?” I want for nothing, hell my dick is still sore from some amazing sex last night, so I say, “I want to do whatever you ladies would like to do today…I don’t care what it is, just find something you both want to do and lets go do it.” They both look at me and like Sisters say…” anything?!?” I look at them and say, “yes, I will even go running around. ” Her hand slipped past the elastic hem creating skin to skin contact. “I know you’re not asleep bother!” Then her grip tightened around the shaft as she rode up and down the length. Not that I had a lot of it, I was a late developer, my dick wasn’t some huge thing that hung between my legs but was on the smaller size. The back of my neck felt her puffy lips slide across it as her long blonde hair overlapped my shoulders falling to my front side. Her actions on my pecker was taking its toll,.