In the movie "The Mummy" they asked why the mummy guy was afriad of cats. They were informed that the cat guides the dead to their place and that he would fear them until he was fully restored.
It is a movie I am talking about, but I believe that it is possible and realistic. The egyptians worshipped cats, and were buried with them whenever possible. you said that she loved cats, and understatement at best

Maybe how we cross over isn't about what religion we believe, but what we believe in and love
I hope that helps

At least someone out here belives that it is a possibility~
As for why they didn't come to you, maybe it was simply that they weren't there for you. They seemed to have been there for her.