So I need to ask for advice.
I love my girlfriend and would never cheat on her. But for a long time I have been having bad thoughts about her sister Rebecca. Now of course that's nothing unusual, her sister is tall, skinny 23yo blonde with a great ass and DD tits. The problem is I hoped it would go away. But lately it has only gotten worse. What makes it even worse is knowing that she shares my number 1 taboo sex fantasy (her drunk ex confided in me once, he was disgusted and I pretended to be but wasnt).
She wants to do it, I want to watch a girl do it. I know for a fact that my gf would never ever do it. Her number 1 problem is being far too vanilla. And leaving my gf wouldn't help even if I wanted to before anyone says that, the girls are super close and would never so anything to hurt one another.
So how do I get bec out of my head? I'm constantly having dirty fantasies about her. Its at the point where about 9% of my fantasies are about my gf (she is stunning too don't get me wrong), 1% about random girls and the other 90% are about her sister.
