Just to add to the information:
If you damage her to 5-15 hp without throwing her off a ledge she actually bargains for her life in a cutscene. In this she offers you a +1 to an ability score (this is what the subtitles say) if you let her live and let her keep the girl. You can roll to change the offer and only offer to let her live for the reward ánd the girl, which can succeed.
After this she gives you a lock of her hair and she leaves.
You can eat the hair, but for some reason this neither gives a ASI, nor removes the debuff. So either I missed something or the hair is bugged/not implemented yet.
I hope someone else comes along to verify this!
