I just don't see why she would choose the JR as the place to simply "stay" if not from hiding from someone, especially since Rumple would leave her the house in a nanosecond and stay at the cabin (again).
Hyde used her/rumbaba to have Rumple doing his bidding not long ago(?), I would hide from him as well if I were Belle (or stay glued to Rumple's side LOL).
No clue on what the spell is, or the argument, or anything else