DH found a lovely wet patch last night. There was plenty of it and all through the duvet, sheets and onto the mattress. Well, we definitely need a waterproof mattress protector, but please don't tell me she's descended into mad old lady cat behaviour? She's approx 16. I'm hoping it's something to do with the fact that she hasn't been out of the house for over a week because she hates the cold - and more snow last night so she won't go out until that goes away. I heard her wee in her litter tray this morning so she knows where it is!