In Better Call Saul season 5 episode 6 ("Wexler vs Goodman"), Jimmy totally surprised Kim in a meeting at which they had verbally agreed on a reasonable settlement of a case. Instead, Jimmy demanded 5 million for the land owner (his client) and threatened to harass the banker (Kim's client) with frivolous lawsuits and reputation-damaging television ads.
Back at their apartment, Kim is furious with Jimmy for making her look like a fool and reaching a deal with the banker--against her advice--to settle and make the TV ads go away. Then, when Jimmy asks how to fix it, instead of breaking up with him, she asks "Maybe we get married?"
Why did she ask to marry someone she was so furious with?