One of our adult normal females (oddly enough also named Kyna) will do that loud, low exhale kind of hiss. It's like she really would like to do a big snake hiss but just can't be bothered LOL but she still wants to register her disapproval at being bothered.

I'd also agree though that you remove the larger water dish and just give her something she can get a drink out of but not laze about in. Soaking too much in their dish isn't good for them and tends to foul their drinking source and cause wet substrate which can lead to all sorts of problems.