Thanks for all the replies!

I just went over the carpet with a black light and OMG!!! I just might have to think about ripping up the carpet and putting in laminate flooring!! There are little tiny pee spots everywhere in the entrance to my bedroom! I have cleaned with a carpet cleaner and enzyme cleaner and the stains are still there! The spots are about as big as a quarter, maybe a little bigger so it doesn't seem like they are "accidents". She might be doing this because her older sister sleeps on a couch in the bedroom. It has always been Misty's domain but I think maybe Tessa is trying to take over?!

I just wish I could actually catch her doing it!
It might be time to pull out the diapers and a onesie!