I don't know about that one. There's no back door, There's no way to escape that that one. Hopefully he won't go there, because when I'm there, he'll have the kids and he wouldn't cause a scene in front of them.
You can't hope Seanna, you need a PLAN... He can always hire a baby sitter and go there.. he wont' always have the kids...
How is the shop setup.. you are the only one working?