Anonymous wrote:I feel like there's more to this story.
Why did it take you 3-4 months (don't you know how long?) to get settled into an apartment?
Your sister didn't kill the cat, btw, the Humane society obviously couldn't find a new home for it.
OP here, my Mom never complained or told me she didn't want to care for my cat. I had many phone calls to my Mom during that time. I think she knew I would be upset and didn't want to face me. I don't believe my mom knew my sister was going to have the cat killed in advance. I think my sister is jealous of me and my success.
My mom knew I had a short term apartment lease that wouldn't allow pets and that I was going to transition to a permanent place and take my cat. I felt betrayed and still in shock.