What you mean?
They were together. As her boyfriend he made the attempt to play house as he was making the relationship work. That included getting stuff for the kids.
They broke up but he has a kid with her. All that **** he did for those other kids is done once they broke up. Naturally you’re going to keep feeding your child. Nothing weird about that.
That’s it. Those kids are the other fathers responsibility.
If she was being rational she’d bring all that noise to the other BDs. Unless she reveals them other baby daddies are dead or locked up there’s no issue here.