Well, I'll be darn.
I used to have a cat that would get mad at me when I left him for the day. He would pee on my clothes. He even peed in a dryer full of clothes when I left the dryer door open.
She actually learned this behavior from my late great Labrador Logan.... He'd do this when he was stressed... and I'd try to stop him with an Elizabethan collar... I'd catch her licking his hot spots when he couldn't.
On that note... We're going out... she'll hopefully cope with it well.