Good Day,
Have you tried setting a "wake-up" schedule for her. Like if she goes to bed at 8-9 pm, you wake her up and insist that she goes to the bathroom around 11, and try it every few hours, till it actually becomes a habit? I realize that you also would be stuck with this kind of schedule for a while also, but the end results may be worth it for a couple of months?! Has her doctors commented on this; and could it be a physical issue? I pray it is not; and that making & sticking with a night time wake up will help her & you's! I will keep you both in my prayers! God bless you's...
Kathy N.