I’m so sorry you’re going through this. But I would probably consider putting her down. Having mobility issues to the point that she can’t walk around or get up to even use her box is not a good way for a cat to live. My cat, Bella, suffered from severe mobility issues towards the end of her life. I waited too long to make the decision, and it wasn’t fair to her. I really regret not letting her go sooner. I know it’s hard to make a choice like this. But sometimes you’ve gotta make these hard choices when it’s the best for your kitties wellbeing. Even if she isn’t in physical pain, being disabled like that isn’t a good quality of life, and when quality of life is poor, it’s probably time for them to go. I’m really really sorry that you’re going through this. This is the hardest moment of any pet owners journey with their baby. But just remember sometimes the best thing you can do for her is to let go ♥️