Based on info from Paleyfest. Sorta spoilery.
So here’s what I’m thinking after Rumple’s no longer having dagger issues he takes Belle out of the hospital and brings her to his home to recover. As she slowly gets off the sedatives the Lacey persona begins to come out. It’s little things at first she gets more touchey feeley getting closure than she normally would. Then she starts making advances and Rumple has no clue what to do and pushes her away. At the rejections Lacey gets frustrated and goes out saying something like, “If you don’t want maybe I’ll find someone who does.” And that’s when she finds Keith. So my thoughts are that Rumple followed her to make sure she’s safe. Then like Keith pushes too far and Rumple comes to help her.
Yeah thats my idea……..for now