Does she work? It would help. Does she have any parents and relatives that give an affidavit statement that they are helping her with the children?
Her option is to go to DSWD and get certification about sole responsibility, or get advice from them regarding the situation. It is a law here in the Philippines that the mother is the sole responsible of the children. Have an affidavit stating that the facts that him as the father is providing finances for the children and there is no affair between them anymore.
By the way, there is no divorce here in the Phils. Annulment there is, but requires a big deal of money and time. The married couple should not be living together as well and have completely abandoned the family is what more likely the grounds for a successful annulment. So I'm confident he cannot get an annulment. Unless he is rich and influential or knows some.
I am saying this because I was a single mother as well to two children and not that I deprived the fathers from their responsibilities but I always make sure that no financial support involve from them to avoid future issues about who gets to take care my children.
If she have parents, I'm sure they can help to ease out her current situation and then she can look for decent job that way her ex will not be troubling her. It is disrespectful for her part to be under his control about her future decisions in life, specially with you who is now involve with her.
