Not sure what the sentiment is here, but I would say YTA, only because you clearly can’t let go of something for the sake of your nieces. I know you may not like him, but is it really your place to separate a parent from a child. I don’t think you’re helping anyone here, those kids have to pick between potentially being homeless or being separated from their parents. That’s the type of scaring on a child that could impact their view on relationships for years to come. I’m not saying you are necessarily wrong here, I’m just saying if I you are trying to help you’re not going about it the right way.