So my mom got re married a few years ago to this hansom guy who had two kids, a boy and a girl. By this time I was around 17 and far from a virgin. I thought he was so sexy and you could tell he has a big cock cus you can see the bulge in his pants. So one day when everyone was out (just me n him in the house) I was downstairs and heard him go in for a shower. So i went upstairs n got undressed n then went into my mom and his bathroom. He didn't hear me at first then i opened the shower door and he was shocked. He was like GET OUT! But i wanted it so i grabbed his dick and started jacking him off. He didn't mind me being there any more. I finished him off, then he jumped out the shower n grabbed a condom n came back into the shower. We fucked n it was great. We kept doing this for ages. Everytime we had the house to ourselves we would (and still do) fuck. His son is also quite hansom though. He always looks at my ass n breasts. So one day i mentioned to him that I'm horny n need fucking hard. I could see him getting an erection so i started rubbing it. We then took off all of our clothes and fucked (he wasn't as good as his dad but still good). I kept getting wet around his daughter as well (she is a known lesbian). So one day I told her i wanted to have sex with her n we had hot lesbian sex. So now i'm fucking the dad son n daughter and neither knows i'm fucking the others. Oh and my mom has no clue either. At their 5th wedding anniversary we had a big party round our place. I dragged him away from the party mid celebration and we fucked in his n my moms bed. I also sucked off the son and got licked out by the daughter. When everyone sat down for the meal i sat next to him and the daughter. I was rubbing the both the whole time while we ate. Infact i didn't really eat. It was amazing.