step-kitty

A step-kitty is a cat belonging to your partner who you do not live with. The cat doesn't belong to you, but since it's your partner's, you kind of love it as one of your own. Basically sort of the cat version of step-kids.

When I came home after visiting my boyfriend, my cat was upset because she smelled my step-kitty's scent.

My step-kitty gets excited whenever I come over because she loves her step-mommy.