What the fuck do I do, /an/ !? My Mother's cat is a vindictive

Firstly, drop the anthropomorphism. The cat does not do this to be mean. There is a reason, but it is not to be vindictive at all.
Is she an outside cat, indoor outdoor, or indoor? Is she an only cat, and how many litterboxes are there? And, is she fixed?
There may also be a health reason. While UTI's in female cats aren't as common in male cats, she may have an issue with her kidneys, so get her a checkup asap.

>>2079209
I used the anthromorphisim because that's how she's been described. She has a UTI and is taking anti-biotics and is almost down to her last bit in the bottle. I know she's trying to tell us something, but my Mother is hellbent on a love/hate. She also (the cat) goes out of her way to attack people, and if you stop her from pissing on something or whatever she doesn't agree with- she'll attack the dog and the other cats.

> She's an in/out - mostly in though after what's going on, Mom wants them all outside.

> She is not an only cat, and there is 1 litterpan but on the days she uses it, it is her and maybe 3 of the kittens that recently came into our home.

> she is fixed, but has had at least 1 litter of kittens (of whom are now grown up)

>>2079214
You should have 2 litter boxes per cat just about, as cats are territorial and aren't fans of sharing litter boxes. She may also not be a fan of the litter anymore as well. But, she may just be spraying because of her UTI which was probably caused by low quality food. Switch her to wet food if you haven't already.

>>2079218
Got it. Thank you.

The vet gave us a UTI food that she does NOT like, and when I try to mix wet food my Mother will bitch about me doing that when the cat will happily eat some wet food mix with the med-food. But who knows...

As for the litter, do you mean the smell of the brand (I don't get the scented shit), the texture? Or do you know?

>>2079223
It's probably the texture if it is that. If she's using it sometimes though, it might not be the litter at all, just keep it in mind for now though. But, keep trying the wet food! Even if your mom bitches, in the end it's best for the cat. Cats naturally don't drink water from water sources, instead they get most of their water from their food, so dry food forces them to have to drink, which they don't like to do.
Good luck anon, I wish you luck and hopefully she'll feel better soon.