Need honest advice.

Posting this anon for now. I just need some advice. I'm going to put my long story short as well.My daughter is 5 and I took her away from her father when she was 2 because he was abusive towards me. It felt just at the time. We now both have a son not together. I was going to wait until she got older for her to choose if she wanted him in her life but lately she's been depressed and emotional. To top it off he found me some how and reached out. Now I've been thinking if I should slowly introduce him back into her life. But I now have a SO who hates him and wanted nothing to do with him that's why we moved 10 hours away....