Sooooo sorry to hear that! I would let her know that you appreciated her efforts to help straighten up but your sewing area is totally off limits to EVERYONE. Everyone in my family knows they don't even touch a single thread on the floor in my sewing area. They don't move anything, even if they think it "looks" messy. If she has never done that before, she may have thought she was helping. Next time, post a sign on the door.......