Broken Quest Ahdaji's Ring - need help Options

[Foster]

Hi,

I've kind of broken a quest. The theves guild one where you have to get Ahdaji's ring back? Well, I have no idea how (maybe it was I offered a lockpick to the guy in jail when I only had the Skeleton Key), but it skipped over finding out where the ring was, and went on to me asking questions about the Coro ring. I put two and two together, but although I know where it is (having asked various people), the quest needs me to talk to the handmaid.

Here's the problem. During the quest I kind of did the Sanguine mission. And they decided to solve their newfound situation by, uhm..butchering each other to death.

Now I just get a map marker for the quest at a location outside Brevil with a paint horse standing there, and absolutely nothing else.

So... can someone help me by either telling me the quest id so I can change the stage and complete it that way, the NPC handmaiden name so I can summon her, or better still, the damn ring so I can have it in my posession and just give it back to Adharji?

Thanks.