We don't know her accusations are true.
I don't like the guy, but I like some of his work. But we don't know the charges are true or if she invented it or even if she believes it herself. It was a messy breakup, and kids can be pressured into "remembering" things that never happened.
From his other behaviors, sure looks like there's a lot of truth to it. But we can't be sure, and too much I read takes it for granted that it is true.
Now- will he take legal action against her?