My cousins 8 month old female kitten peed on her back!

Hello,

Lu is an 8 month old, medium long hair, female.

She has peed on furniture since my cousin took her home when she was two months old. But tonight it got even worse, while my cousin was sleeping, Lu peed on my cousins back!

What can she do?

Has the kitten been to the vet for a check up?  That is where you should start.  Also is the kitten spayed?

No, she hasn't been spayed. And at the moment my cousin cant afford to take her to the vet. Though Lu did get her first set of shots a few months ago and she had been peeing on things before that appointment