It's almost as if everyone's view on this will be colored by the zygotes. How odd.
He just has to hope that no one else comes forward. If this was a one-time thing, a drunken high school mistake (he went to one of those super-rich all-male prep schools, which tend to manufacture assholes), then he can be forgiven. If other women come forward and it turns out that he is a life-long assaulter, then he is in trouble. And so are the babies!