Jeannette runs into some financial trouble. Describe how her father contributes. How do you think he does this and what does this scene say about Rex?

Are you referring to when Rex gives money to Jeannette to finish university?

Yes

Rex claims he won the money gambling. I think it might be all his savings or even rent money. This moment gives Rex a little bit of redemption for the very rough childhood he gave his daughter. Despite abusive conditions that Jeannette lived under, Rex does love Jeannette: the money represents this love.