My father molested my sister, how do I face this?

Anonymous
I'm 17. When I was around 12 my sister who is 7 years older than me told me while she was in a fight with my dad that he wasn't as great as a guy as I thought. Turns out he molested her when she was younger. Ever since then I haven't looked at him the same. I understand my strange feelings towards him that I couldn't explain, like thinking he was looking at my butt and angleing myself in certain ways to escape a certain gaze. She seems over it but I have a feeling it still bothers her. My mom walked in on it happening but they stayed together. This has been pushed so far under the rug, we have never spoken of it ever. I'm not sure if he molested me and that's something I struggle with. Everything in my life is perfect except my family life. I love both my parents so much but I just don't have much connection to either of them. I don't know what to do or if I should ever bring it up? This haunts me almost every day. I may not get sad over it but I'll have subconscious thoughts about it occasionally. Do I ever bring this up? I don't want to break my family. But I also don't want to die never bringing this up again. I don't want to hurt my mom and cause conflict. I'm going to college this fall in a few months so I'm not sure what to do. This hurts me. Thanks. Ps my parents don't know I know & I don't know if they've ever told anyone themselves.
My father molested my sister, how do I face this?
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