What unique choice does Adichie describe in relation to a husband cheating in regard to the start of the letter in the book, Dear Ijeawele, or A Feminist Manifesto in Fifteen Suggestions?

Adichie says that many people believe that a feminist response is to leave a man if he cheats. Adichie thinks that staying can also be a feminist decision, depending on the circumstances. The main point is that both genders are treated in an equal manner and have the same options within a marriage.