3 yrs into the relationship and my FH admits that his bm oldest daughter is not his bio-daughter. But I knew the moment bm showed up at my house a year and a half prior. So my FH is caring for a child that's not his, I'm not the one to break that up so I let them carry on I have no place in that. So my FH has 2 kids plus one with BM.(girl 12 is his, boy 9, and her oldest who is not his bio is 14. ratchet a$$ BM. why you ask.