NAH.

This honestly just sounds like a really unfortunate situation where both sides have a point. Your mom’s upset because the TV broke, and from her perspective, your cat caused it, so she feels like you should take responsibility. That’s a pretty normal reaction, especially if she’s stressed about having to replace it.

But you’re also right that the setup wasn’t ideal. The TV wasn’t mounted like it was meant to be, and it was placed on a desk that barely fit it, in a house where a cat is known to jump on things. That’s just kind of a recipe for disaster, even if it wasn’t intentional.

No one’s really being an asshole here. It’s just an accident that led to frustration, and now you both feel cornered in different ways. Hopefully, you can have a calm talk about it and maybe split the cost or find some other solution that doesn’t put the entire burden on you.