AITAH for ruining my dad's life? A little bit of background; I (25F) haven't spoken to my father (49M) in roughly 7 years. Our relationship has never been very close, partly because when I was 10 my mother remarried my stepdad and we moved cross-country from West Coast to the Midwest/Great Lakes area. My father has 5 kids, myself and my brother (24M) who is on the Autism spectrum and is my best friend. And his three daughters from his second marriage, all under the age of 16. My father cheated on my mother and gave her an incurable STD (HPV), verbally and emotionally abused her, neglected my brother, and has always had a weird obsession with me and his other daughters.

For the last 10 years I've refused to see him, even when I was in the state and a minor. My grandmother (mother's mom) was our court-appointed chaperone. When I refused to see him, my grandmother asked if he still wanted to see my brother (14M at the time) because she would be happy to make sure they saw one another still and have my grandpa spend time with me while they visited. My father refused saying it "wasn't worth it" if he didn't get to see both of us. He lived 8 miles from my grandparents and my brother still wanted to see him. This is one thing I don't think I could ever forgive him for.

I've also started to notice some weird things about his online presence and his relationship with my oldest sister (16F). My father has maintained a social media presence for my sister for at least 6 years. Its pretty obvious that she's not the one posting. It's all pictures of her he's posted on his profile and tagged her in, none of all three girls. And posts of the two of them, but with the verbiage and writing style of a 49 y/o man and not of a teenage girl born in '08. She has never posted on the account herself afaik, and she is only friends with his friends and our family. Plus, there aren't any pictures of her and our siblings, just her and my dad, like I said. Currently, a family member who interacted with my father separate from myself has informed me that the oldest is now living separately from my ex step-mom, who is a naturalized American citizen (obtained citizenship while married to father), but is native-born Mexican. Sister's mom lives in Mexico with the younger two girls and the oldest lived with my father in the states alone. He has removed her from public school and put her in online schooling, and also doesn't allow her to date. All of these things have led me to believe that my father is up to his old shenanigans again.

For the last 5 years, whenever my father has entered into a new relationship that he's made public on social media, I have gone behind his back and revealed some truths to his partner, which usually ends in them leaving him. And I have also been trying to gather evidence to prove my theory about what's really going on with him and his relationship with my sister. Many of you would think that a close relationship with ones daughter is normal and sweet, but my father is a dangerous man. In 2003 my parents divorced because I (4 at the time) and my older cousin (7f) as well as a family friend all came forward to report that my father had touched us inappropriately. The fact of the matter is, he's a spedo who forced three or more young girls to perform acts on him and tried to get us to hide it.

I've successfully gotten some details on possible situations he's been caught in with my sister that might be considered inappropriate. And I've also managed to end the last 3, relationships he's been in. Currently my cousin and I are also looking into what possible legal actions we can begin going forward.

On one hand I feel like I'm being paranoid, that there's been no evidence he's been inappropriate since 2005. But at the same time, it's almost impossible to tell myself there is no possibility he's been inappropriate with her or all three of the girls. And the fact that he has cried over missing out on my wedding and that he is devastated he'll never meet my daughter (due early next year). And that he's consistently being dumped is pretty gratifying.

So, AITAH for all of this and WIBTAH if I continue on this campaign?