I would do one of two things (and I have done both on different occasions) Lock her into the new point you want her to be in and don't let her out for 3 - 5 days, like you would do if you were starting with a new flock or moving a flock to a new coop location. Or I would move her about Day 19 (lock down). Since the eggs will be rocking and cheeping by that time she will not abandon them.
Ooooh that's a good idea. Maybe I'll wait then since the other girls don't seem to be bothering her too much and she can come and go as she pleases. It's after they hatch I'm worried about. So I'll move her a couple days before they're due. Thanks!!!