increased thirst in combination with incontinence could mean there is involvement with the kidneys.
If she has a UTI there may be no other signs besides incontinence, straining to urinate (she thinks she has to go but doesn't-wich can also be hard to see with girls), and foul smelling urine.
If it were my dog, I would take her in. Any time a well house trained and reliable dog has an accident (particularly one that she wasn't intially aware of - like if she had intentionally squatted), IMO it is cause for concern, either to remedy the discomfort (this is a mild word) of a UTI or catch something else early...
I can only please one person per day. Today is not your day, tomorrow doesn't look good either.
"You didn't know of the magical powers of the break stick? It's up there with genies and Harry Potter as far as magic levels go." SisMorphine 01/07/07