I'd too say leave her in there alone.
It is best (from what I think) to leave females alone when laying. The stress might cause egg bound due to the fact that its not willing to lay (not being safe) and once the eggs grow inside her, she might get into the trouble of egg binding. So I leave all females alone for at least 24 hours before I peek again. If she's finished, then I take the eggs out. If not I leave for a couple more hours and see if she is still laying.
If not I'll get the eggs out and incubate those first and let her be in the nest box for a couple more hours/days until she is done.