Hugo,
It is a crazy messed up roller coaster ride. Unbelievable, really. Except that we've all been on it--that is why we are here in this forum.
You mentioned being physically assaulted. That is really serious, and you have to be really careful to protect yourself from that. Please read this so you can better understand your situation, which has a lot of risks for you:
TOOLS: Domestic Violence Against MenSuicide attempts are also very serious. Be ready to involve police or at least a suicide hotline if she starts talking about that again.
What is your living situation today?
Are you living with her and her children?
Do you have children of your own?
Does she verbally or physically abuse her children too?