How to keep the pants on mom?

My Luz would come out of the bathroom with her Tenya pants around her ankles.
I would have to chase her down and telling her I could see her butt or what ever else might have been exposed. I made sure she was clean and dry and either pull them up or change them,
A full length skirt may not work. You might try a short night gown or a long tee shirt. This is what I finally got Luz to wear and it helped for awhile then, It became just a tee shirt. No problem with the underwear showing since there were never any visitors other than the nurse or an aide for while.
If she cleans herself after going, you may have to check the bottom and back to make sure she raised the hem high enough. Of course you knew that already.

Supervise Mom when she uses the facilities. When she comes out with no pants on, gently guide her back into the bathroom and help her redress.

Will she wear a skirt? They were much easier for my MIL to maneuver than pants were.