Sharing A Boyfriend

I have a stepsister who looks enough like me to almost be my twin. When her boyfriend found out about me, he thought that was really exciting. When I walked in on them having sex on day, they talked me into bed with them. Then I found out they planned the whole thing. Things only heated up from there as our threesome relationship developed. I thought it would be fun if we each wrote about what it was like for us. This is our story, as told by each of us. I hope it's as exciting for you to read as it was for us to live it.

Erotic romance - 23,900 words