I can't bring myself to believe that she didn't know the whole story. I certainly don't see her as a victim of a manipulative man.I understand that she wasn't convicted of assisting an offender, but that doesn't mean she didn't. Only that the crown couldn't prove that she did.
As for her new identity, I wouldn't be suprised if her new partner did know who she was. The same goes for the kids in the Bulger case, I imagine their partners know too. As for her kid when it grows up... I imagine their mother's previous identity would be the least of their problems.
People are fucked up, and no they don't deserve to have children, but I don't think that living in a society which can choose who can have children would be any better.