Maybe she’s having trouble swallowing.
Maybe, I don’t really know too much about Parkinson’s, but I hear swallowing is an issue.
I do know about incontinence unfortunately. When a person has no control over their bladder or it’s discharge, they have to do everything they can to keep the sucker empty while they are in public.
Nobody wants to mess themselves and have other people know about it. Plumbing failure is a true curse of advanced age.