Board Thread:General Discussion/@comment-24589671-20141027013232/@comment-24674051-20141105164612

Actually, I'm guessing that the mysterious house belongs to Helga (the middle sister). Pabbie only said that she and Ingrid disappeared, not that either were killed.

My guess is that Helga somehow obtained the Hat from Ingrid before the second curse (and probably before Ingrid made her way to the LWM prior to the first curse). During the second curse, Ingrid came back, found Helga living in Storybrooke, and has her kidnapped somewhere (along with Anna, and possibly Kristoff). However, before she could go back to the house, Belle and Gold had their squatters honeymoon, and Gold obtained the hat.

Another scenerio is that Helga and Ingrid were both banished to the LWM prior to the first curse (one willingly, the other not so much), and were pulled back to the FTL when Regina destroyed her curse (much as Baelfire and Hook were pulled back even though they were not part of the original curse). Which could also explain the house appearing with the second curse, since Helga (assuming it's Helga's house) would have been brought back with the second curse.

Emma and Elsa should probably check the census records to see if Helga came over.