At a certain level of affection or corruption (?), you can also enter their tent. If you steal too many items, a guard will catch you. Ugotha is then disappointed by the MC and breaks the spell. But I have no idea what happens next. I didn't want to spoil it for myself and loaded an old savegame.
I couldn't figure out which personal item to bring to Imawyn so she could break the spell. Somehow she wouldn't accept all the things I stole from Ugotha.