I (18F) live at home and my room is in the basement, my sister bought a cat when she was 20-21( she’s 28 now) but moved out bc of school and left the cat at my parents house. My mom shut the cat in my room for about a hour (to mention my room is big, it has a litter box in it because MY cat likes to be in my room and it has a cat perch and water bowl) in the hour my sister cat was in my room, she pissed on my bed ruining my mattress, and shit on my carpet floor and smeared it into the carpet. I want this cat gone. my sister doesn’t want her cat back and I don’t want this cat, she’s always pissing on clothes and in the vents and I’m so close to taking her to the pound. My parents are mad at me because I need to buy an all new mattress (not cheap and I don’t have the money) duvet and tear up my carpet now and they tell me to just “keep my door shut” but that shouldn’t have to be the case. I need help I want this cat gone and Im about to let it outside because I hate it.