The quest gives no xp when it's completed. We got the potions but nothing else.
I'll add a kind of suggestion, which is a bug in the sense that the quest seems somewhat incomplete. There should be an option to carry the girl's body back up, or there should be a VERY good reason why this couldn't be done (ie. she disappears when the portal is closed).
I roleplayed carrying her back up, but then the dialogue with her brother made no sense. Perhaps it could be so that the girl could be carried, and left in the house so her brother could mourn her, or maybe she could be carried to the Mausoleum, and then give the character a few points towards Good. I think leaving the girl's body down there is Evil behaviour.