Frustrating for sure. One thing I would try would be to set some kind of an alarm, maybe on your cell phone, that will go off. “ When it is time to go to the bathroom”. Maybe start out with a 30 minute interval, if she brings up the bathroom before the alarm, you can point out it’s not time yet. The alarm hasn’t gone off, lather, rinse repeat, knowing that the alarm is gonna go off within a couple minutes yourself to the bathroom. As soon as the alarm goes off, say mom it’s time to go to the bathroom! Take her in and she either goes or she doesn’t, that doesn’t really matter. If you get a sense for how frequently she truly biologically needs to go to the bathroom and it’s every three hours, you can be good to extend the time period from 30 minutes to 45 to 60 to whatever. But you’re establishing a pattern that lesson until the alarm goes off it’s not time to go to the bathroom. Obviously if she starts having accidents , you may have to alter the timing or have her check for urinary tract infection. I’m sure she’s struggling with losing control and lack of awareness about basic biological functions and that is heartbreaking. I hope this works.