The day my wife and I divorced, I went to her sisters-in-laws house and told her that I have wanted to fuck her ever since I met her. She was surprised. She felt the same way. So I pulled my pants down and my underware and started masturbating. She watched for a while then asked if I wanted a BJ. I said yes and stripped off my shirt. I was naked, she was fully clothed. She sucked my dick. While she was sucking my dick, I said "because I am naked, and you are not, I was hoping I could at least see your tits." She took her top off, and she wasn't weatring a bra. I started sucking on her tits and she asked my if I really wanted to do this. I said yes and she took off all of her remaining clothes and pushed me down on the recliner, crawled into my lap, and started fucking. I had no condom and I stated cumming inside her a tinuy bit, so I asked her to stop. I didn't lose my erection! She did notice the cum! We went to the bed and I felt back in contol and realized that if she was going to get pregnant, than she already was because I came, so I figured why not continue to fuck. I got on top of her and fucked her hard. I then pulled out and came all over her tirs by jerking off into them. We agreeed it was a one time thing, but when she had her period the next week I knew she wasn't pregnant and started regularly coming over to fuck. Imagine what my ex would have thought if I had gotten her sister pregnant. I met someone and decided to get msrrierd, so I stopped coming over for sex. She told me she didn't mind sneaking around my wife if I wanted and I didn't because I didn't want to hurt my new wife. Last summer I came by, and confessed my bi-sexuality to her. Aside from a few men, she is the only woman that knows that I like cock too! She suggested a bi mmf, and I was so turned on that when she went to the bathroom to pee I started masterbating. She came out and I didn't hear her and she caught me doing it. We then got naked and started masterbating togeather. I was thinking that it would be just masterbation and not sex, until she sucked my dick. We now regularly make plans to screw. I love my wife, but my sister-in-law is a great fuck. We havn't done a bi 3-way yet, but I hope we do! I want the two of us to make out with a cock slipping in between our two kissing tongues. I want her to see me take it up the ass. I want her to lick his cum off my face. I am masterbating as I type this.