I am dating this very nice guy. I am in college and I stay over at his place at least a few times a week. When we have sex it seems kind of weird. We have sex he gets up and goes to the bathroom. In about a minute he comes back and we do it again, he cums both times, its awesome. Or so I thought at first. Well I was talking a girlfriend of mine and was telling her about this, I was kind of thinking it was a little weird, him leaving and coming back and being ready to go. And she said something I had really never taught of before. She said, “His brother lives with him doesn’t he?” I was like yeah, she says, “they are twins, right.” And then it hit me, I can’t believe he would ever do this to me. I think I have been having sex with both of them. Is this possible, and I just being way to paranoid??? Please help…