In The Birdcage, Armand makes a comment to Katherine that he got his son as a "trade" for giving Katherine money to start her business.
Armand: you've done well.
Katherine: Because of you. The money you gave me started this place. You should have gotten stock for it.
Armand: I got Val for it. It was a fair trade.
Did Armand really give Katherine money for full custody and parental rights of Val?
Later in this conversation, Katherine admits to not being maternal, so she wouldn't have wanted Val to begin with.
I haven't done much for him in the last 20 years. I'm not exactly maternal.
Why did Armand have to give her money if she didn't want Val in the first place?