I am so sorry that your DD is having so much crap from that SO!
Tell her that he isn't a necessary person in her life. If HE wants to
go, well then, let him go. BUT....He will have to pay for the child
for 18 years! AND he will have to take care of her financially.
He certainly isn't doing her any good psychologically right now.
She would be better off without the sorry brat!
Sorry, I just hate whiners and that SO is a whiner. Blaming all
his problems on her. I would have to knock him in the head to
wise him up.