AITA for refusing to be around nieces boyfriend?

My niece (21F) and I (35M) lost contact for several years due to the typical family drama between her mother and I. A few years ago my sister passed away unfortunately before her and I could hash out our differences. At the funeral, I reconnected with my niece and nephew (24M).

They both started coming around more and my wife and I started gaming a lot with them. My niece always asks my wife and I for advice, and we do our best to give good advice, typically my wife is better because they are only about 8 years apart.

However, she’s met this new guy. My first interaction with him was him recommending me several manipulation books wish I considered a red flag. Beyond this he is is felon, which of course doesn’t always make people a bad person. He has a kid, which my niece has always expressed never wanting kids. Lives across the country, which my niece did long distance and said never again.

Well as we move on there has been several exchanges where he has just verbally tore into her. she is not perfect and has her own flaws but that to me doesn’t justify some of the things and names he has called her. He’s blocked her multiple times, ghosted her. You name it he’s done it.

After the last time this happened, she said she was done. Then we found out recently she decided to give him another shot. On top of that she didn’t speak to us for weeks because she didn’t want to admit that’s what it was.

I just told her I was drawing my line in the sand and said I will never be around this guy. I feel really shitty about it because it’s basically a choose us or him but that’s not what I’m trying to do. If she wants to be with him that is totally her decision, but I just can’t physically be around someone who I know repeatedly disrespects her.

So, AITA?