She should have done a full evacuation beforehand and then worn an adult diaper just in case.
Or maybe she was getting coaching from Huma in the ladies’ room and didn’t have to pee at all.
What I read elsewhere is that Her Highness would not do her business if there was anyone else in the restroom. The time took for the restroom to clear out is what made her late. I once had a female dog that was very peculiar about where she went, but not who else might be there. Hillary’s a bitch of a different species.
I bet she plugged up the toilet and was late getting back because her burlap pantsuit got wet from the overflow.
I think she was being told what the next questions were going to be and how she should answer them. And she might have needed a little lovin’ from Huma. Or the bathroom attendant.