He has sole legal custody and she does not pay child support nor has she ver paid child support. We are both responsible for this kid. Which is why I am not understanding the whole thing. We are not married therefor if he chooses to leave I am not entitled to any of his money. I dont mind counting his income as we do live together and we split the bills but we also split the expenses of the children.

I did not claim his daughter, only mine. But on that same token, I didn't claim his income, only mine.