I'm married to a beautiful woman. She has an identical twin sister. It's used to be impossible to tell them apart but it's easier now that they are a little older. About ten years ago after we had been dating for a year or so, we were all alone in the house. My girlfriend and her sister were gone for a bit then my GF came in and sat next to me and snuggled up. She said her sister had gone out so we were alone.

We started kissing and as we kissed I took one of her boobs in hand. I immediately realized that this was the sister I was kissing. My girl's boobs are noticeably smaller and I knew it as soon as I started squeezing. Now these two had told stories about kidding around and making out with each other's boyfriends to see how it went. I didn't expect it to happen to me. Even though I knew it was a scam I played dumb and went along. I was all over her, tonguing her mouth, squeezing her tits, rubbing her pussy. She squirmed around a bit trying to slow me down. I figured I was in the clear. I heard the car leave so I knew we were alone and besides, as far as she knew I thought she was my girlfriend.

I moved fast getting my hand down her pants to work her pussy feeling her getting wet fast. She was trying to move my hand and say something but was also responding as I kept kissing her hard and rubbing her clit. Before long I had her tits out and was sucking and squeezing away. She was making excuses like her sister was going to come home but I was saying don't worry, we'll here her come in.

In one quick move I got her shorts and panties off. She was in front of me naked from the waist down with her shirt and bra pulled up. I dived on her pussy and started munching and fingering her like a maniac. I'd rather have taken my time and savored it but didn't want to take any chances. I ate and fingered her to a hard orgasm. As she was saying enough, enough, I popped my cock in and went too town. I heard her mumbling oh no to herself but she felt to good to speak up and make me stop. I pumped away til I shot my load into her. My GF was on the pill and I was pretty sure her sister was too so I wasn't worried.

When I was done I said I had to go. I fixed my clothes and got out of there in a hurry with her just starting at me with a weird look on her face. After I kissed her goodbye I bailed. I wanted out before my GF got back. I was careful not to be around that week and when I saw my girl again I didn't say a word about the sex. I never acted towards her sister any different than I had before. To this day, I'm free and clear. My wife has no idea. As far as her sister knows, I don't know anything about it either. My girl and I had sex on that couch a hundred times so it wouldn't matter even if I accidentally said anything. It's her secret to keep and she's kept it this long. It's a nice memory that comes to mind when I see her that's for sure.