She loved him, yes, but she loved me too. Maybe he knew all along. Suspected this boy was not his son. He grew to treat her terribly. Gambled away all their money, drank all the time. It is even implied he was verbally abusing her and being physically abusive towards my boy. Perhaps it's my fault. Perhaps he always knew or suspected.
I will focus on him. I'll take care of him. Ensure he's happy...