I don't even know where I should categorize this story. I'm also very sure that very few people will believe it. But here goes. I was 30 at the time, and my girlfriend was 21. I am no longer with her. This all happened about 8 years ago. This girl was a sexy maniac! I was the luckiest bastard. I mean she wanted it all the time. She would suck my cock while I watched the game on tv. She would wake my up stroking me, or sucking me. She always wanted sex. She loved taking it in the ass. I mean, I had it made. She was a looker too. Great little body. Anyway. We were fooling around at her place, when she tells me she wants to tie me up and have her way with me. I'm all for it! She takes off all my clothes and ties my hands and feet to the corners of the bed. Then she proceeded to suck my cock and play with my balls. She was going slow. Driving me crazy. Then she heard a noise and told me to wait here and left. Ya, like I have a choice of waiting! Lol. Anyway a few minutes later the door slowly opens and in walks her little sister! She is 16. I am naked and hard tied to the bed. I mean my cock is so hard its bobbing and throbbing with my pulse. She giggles and asks,"so, how ya doing?". I asked her to leave. She said nope! I was like, wtf? Leave Trish! She said, no way. Look at your cock! Now I am not bragging, and every guy likes to exagerate, but I honestly have an 8 inch cock thats thick too. Anyway, I said, I've seen it, but you shouldn't be! She then got on the bed and started sucking me off! I was freaking. Ya it felt good, and the dirty side of brain was all for letting this teenager suck my cock, but I didn't want to let her sister come back and see this. I told her to stop and that her sister will be back any second. That's when my world stopped for a second. She said, no she won't. She said I could come up here and do what ever I wanted to you. She will wait downstairs! I was like, no fucking way! Then I heard my gf's voice from downstairs, "yes fucking way! Enjoy it baby!". This 16 year old proceeded to rock my world. She sucked and fucked and got off numerous times. Bringing me so close then stopping so I wouldn't cum. I was going crazy. The she got out the lube and lubed her ass and my cock. I knew what was coming! Then she said, ok we have to go slow. I've never had a cock in my ass. And yours isn't a little toy! I was horny and close to cumming. I just had my head in her ass when I came like a fountain! She was so vocal! Ya baby, cum up my ass! And , let me taste us. She proceeded to pop me out of her ass and suck me dry. I was sore and spent. But I remember every second of that night.