After three calm weeks of having a new born, our two cats have taken to weeing on or near her things; this has happened both sneakily and completely overtly, with our male cat climbing on to the car seat in front of us yesterday and weeing all over it. The female has also started to rub her feet on any slippy or loose surface in a skiing motion, and we think this is a precursor to the weeing. We have a neutered male and spayed female, both very friendly and quite interested in the baby, and apparently not antagonistic - does anyone have any idea why they have suddenly started this, and how we can stop them? Going slightly mad here.