Bed-wetting is hard enough without mom forgetting to check on your supply. I well sadly there's only one way to handle this.
Luckily your sister has a fresh supply cause she can actually manage to keep her bed dry for a week. Looks like you’re going to have to borrow hers until mom can get you some more at the end of the week.
To make matters worse, its a sleep over night. Talk about bad luck, I think we all have a week like this every now and then.