No. I don't. 

But get her angry enough and you might eventually have a massive angry Ball of fur problem yourself. 

Jokes aside, she'll want to repay you, but if Donnel is a complete ass in general and to her, she won't be a slave for fun or take abuse. she'll disappear back into the streets. 

She can be manipulated though. Just find a good reason she won't just run away from a band of obvious bloodthirsty monsters killers. :)