I think I know who Lucy's auntie and uncle is!

let me explain so Lucy in whiterun used to live on a farm before getting kicked out by her auntie and uncle. we know whe is a nord so this narrows down things alot. we also cant expect her to have travelled particularly far because of coach costs. (I known it's the same but lucy dosent have dragonborn privilege) so the final verdict is snow shad farm right next to riften. its close enough for Lucy to get to whiterun, a very good reason not to stick around because of honourhall. the farmhouse is big enough for three people to live in and there is one nord male and impiral female living there. its by far the most likely candidate.