Should I feel bad

My little brother has a cat that I can tell he loves but not really keeping up with the duties that come with it example the litter box hasn’t been changed in WEEKS the whole upstairs reaks of poop and ammonia also my whole pregnancy the cat started by peeing on my clothes then it went to my brand new mattress and peed on that at least 3 times she peed on my sandals

She also peed on my moms jacket and she only did that because it was on MY keys yes this cat pissed on my damn car/house/mail keys being prego I haven’t been up to doing my makeup for months this week I’ve been doing my makeup and guess what she peed on my makeup and in the area this feels completely personal and nobody cares I have been trying to find her a home with no luck so I’m just going to take her to the shelter but I feel so bad for my little brother but nobody cares that this cat is making my life a living hell I’ve tried spraying her with water when I see her near my room or even me in general I’ve sprayed stuff with lemon juice I even keep my door closed but I never know if she’s under the bed because I can’t get down that low I just don’t want her to continue this and also start pissing on my baby’s stuff

Has anyone experienced there cat having a vendetta against them since being pregnant? Also I never was close or really cared for the cat so idk if it’s an attention thing I’m just really upset about and it’s depressing why am I being targeted she really pissed on my keys like reallly and my makeup was huge slap in the face

Even when the litter box is clean she does I even noticed she does it right after it’s been cleaned