Wow, this is a pretty complicated situation and I think counseling from professional sources are in order; she can get free counseling from a number of local sources like speaking to crisis centers for drug, family or other support. I’d suggest she contact them for further assistance before making any drastic decisions. You didn’t mention any abuse, but if she should find herself or her child not feeling safe, she should also consider staying at least temporarily with relatives or friends while getting counseling.