I'm in so much trouble I don't know what to do. I've been having s** with my girlfriends sister on the side. We knew there was a risk of getting caught but we never guessed she would get pregnant. She's totally sure it's mine cause she says I'm the only one she's been having s** with. Either way we'll do a paternity test to make sure. But that doesn't change the fact that now my girlfriend is going to find out I have been sleeping with her sister. I am so f*****, and not in a good way.