That is financial abuse.
By saying you have to stay 20 years with me, or I will put you through financial hell—yes abusive. If she argues as much, and lists all the things like “I can’t go into his man cave, or he get’s angry, I can’t touch his musical instrument, etc.” you will find yourself having a very interesting divorce where the prenup goes out the window, like it often does.
And you do need therapy.
What about a woman who would suddenly get mental health issues, like postnatal depression, after children? Is that a grounds for divorce? It would be the mother of your child! Anxiety and depression are not normal after birth, baby blues maybe but not those two which are a completely different type of experience.
Also in a CATHOLIC forum, we are debating divorce and prenups? Pray tell, this is surely a sign you are not ready for marriage.
My husband and I never once talked about that. You will find that many couples here prior to marriage never discussed the dissolution of their love and marriage.