By confronting her "emotional immaturity" during their
separation (p. 41)
Emotional immaturity has two components, understanding your emotions and managing those emotions. Emotionally immature people cannot reap the benefits of marriage as well as the emotionally mature can. Emotional immaturity accounts for why some couples divorce and some don't.
If you are not getting everything out of your marriage that you would like, take a lesson from Jada and conduct an emotional maturity check-up.