Is AUTHOR wrong in the post ? POST : My dad has not been a pretty toxic influence for most of my life. He was emotionally abusive and manipulative with my sister, my mom, and I, and has had problems with addiction for his whole life. As a result, my mom kicked him out of the house about 10 years ago when I was 14 and my sister 15. My mom is the sole bread-winner for the family so the house and basically everything in it was purchased by her.

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When she first threatened to kick him out, his counter threat was that he would never come to visit my sister or I, and when he was kicked out he stayed true to his word and didn't speak to us for 4 years. He came to my sister's high school graduation, and since then we've only spoken on holidays, and only seen him at graduations. He's currently sober and has been for the past 9 years, and he's the manager of a sober-living house where he gets compensated with a room &amp; food, but as he's getting older that situation is going to expire soon.

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Now in all of this time, my grandma (my dad's mom) has been declining in health and myself, my mom, and my sister have been the ones taking care of her. She's 90 now, and my dad is 70 and his eyesight is fading (he's diabetic and isn't really taking care of himself). My grandma has invited my dad to come stay with her so that they can sort of take care of each other.

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That presents one major complication, though, because my grandma has a reverse mortgage on her home, and when she dies the bank will take her house. That will leave my dad without a place to live, in his 70s, with poor or no eyesight. Here's where I'm conflicted, he's been abusive and manipulative to our whole family since I've been born, I don't know if I could bring myself to help him. I don't think he would do the same if the roles were reversed. 

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I'm a compassionate person and the idea of leaving him to fend for himself in his state makes me queasy, but I also don't know if I could help him. I work in theatre and don't have a lot of disposable income, but even if I had the means to help, I'm not sure I would. 

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So, AITA for not wanting to help my dad?

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TLDR; Dad has been an asshole, now he needs help and I don't want to bear the responsibility. 