We do not know, but I suspect it won’t be pretty. EDIT And I expect Regulator is right that, especially if we’re talking about Devotion/Ancients paladins, giving in will lead to the Oath Broken condition.
There’s some speculation about the Dark Urge origin over at
https://forums.larian.com/ubbthreads.php?ubb=showflat&Number=858441#Post858441.