<human>: My SO and I live with another couple, and that couple's cats (3 cats total). The cats were peeing on a lot of our stuff until they got fixed, and the couple assured us the peeing would stop. It did for a while, but now it seems to have started again. The cats are also throwing up on the carpet and today I found a poop on the kitchen floor.

My boyfriend thinks of the cats as partly ours, since we get to hang out with them without ever changing the litter boxes or paying for vet problems, so he thinks we should just clean up the cat pee and not make a big deal about it. I am getting tired of cleaning the same things over and over again. Some of the furniture they most like to pee on is in common areas so we can't just keep the cats away from it.

Is my boyfriend right, and we should just keep cleaning up after the cats, or should I ask the couple to do something about the cats? Should I ask them to find a way to prevent all the peeing, pooping, and puking, or just go find them every time I find a pee, poop, or puke and ask them to clean it?

Can you give me the gist of the text in a nutshell?
<bot>: I don't want to deal with housemates' cat messes; boyfriend thinks it's easier to just clean up after cats than ask housemates to deal with messes.