I know nothing about the law but Rebelcaptain rival divorce lawyers au where one of them represents one of the spouses and the other represents the other spouse and they're both actively trying to sabotage each other to get the best deal for their respective client while also having passionate hate sex on the side because they may hate each other but they're also really attracted to each other

(bonus points if the couple is Han and Leia, Cassian represents Leia, Jyn represents Han, and they don't end up divorcing in the end)