So, I don't know if it's a feature or a bug, but if you have a project in [read only] and the person with the edit copy closes it, your instance stays read only. I have an idea here that addresses that, but in the meantime, you may be able to manipulate that to your advantage. If you open the same project twice, the second copy should open in read-only and you could then close the first. What happens when she goes to open it, I'm not sure, but I'd test that out.