Sleeping together Sisters

When we was younger we used to play this game  CATCH KISS GET A LIL BIT and my sister was always around boys. So we kind of figured she was going to be gay. Well one day we all was outside playing like kids are suppose to. Everyone decided to play the game. She wanted to be with the boys, while the girls hide. She found me and of course we had to do what the game said. She told me to just relax and she was going to do everything. I didn't think she was going to go all the way but she did! She ate me and have been for years now. I wanna close this chapter in my life and move on. I'm not gay i have been interested in men all my life. But how can i break it off with her?