Oh no! :( I'm so sorry to hear about poor Bassett. :( I'm so glad you trusted your instincts and took her to the vet when you did.
We will definitely be praying for her and sending positive thoughts her way - and your way. I know it is so difficult, but you need to be strong for her, for your other kitties and for yourself.
{{{{hugs}}}} go out to you and poor little Bassett.