Advice on my friend

So my friend is at least almost four months and I'm five and a half and she's 17 but her baby father was cheating and abusing her so she broke up with him. He was very controlling and didn't even let her message people and when they broke up we started talking again but now she's stopped and I checked her profile and they're back together. I know it's none of my business but even her own family don't want her around him but she moved in with him and his family anyways. Her baby daddy is 19 almost 20 and does nothing but get high school girls high and drunk so he can screw with them. Not only that but he has another kid with another girl and doesn't even support them. Let alone he abused my friend knowing damn well that she is pregnant. I don't know if I should try talking to her about it because why would you want that around when your baby is around? And I really don't want her getting mad at me either.