In-laws had the same thing going on for years. The carpet, furniture, the floor vents (yes, it got aerosolized 🤢)... The dumb cat even peed in my shoes once or twice while I visited. It actually seemed vindictive, like whenever a change she didn't like happened, she'd go and pee on something we cared about.

I already didn't really like cats, but between that one and the one we've been watching now for awhile... Now I really don't like them.