She's not the first and won't be the last in this situation. Hopefully she will put the baby before this man and get the strength then to leave him if she has too. Being there for her is all you can do. They have to learn on their own and sometimes it's a very hard lesson, but they have to do it. Nothing you can really say, except encouragement to give her strength to do what's right for her and the baby.
Being a Grandma is the best...............
Come here and vent, as mother's we can all relate.