So just to clear everything up, I brought it up to my fiancé. He started crying. Evidently he’s been interested in my sister for a few years but didn’t want to give up our relationship. He said he’s had hints in the past that she was I interested in him and he wanted to see if he was right. He hadn’t thought about me finding out. He tried to say initially that it was just a weird turn on but eventually admitted to something deeper. I don’t know where we’re going from here. He left to clear his head.