I was a bit apprehensive about introducing her to my older cat, Ksusha, who has gotten so used to being the only (spoiled) kitty in the family. I thought there's a chance that Big Kitty would be hostile to Little Kitty and even attack her.
I couldn't imagine that it would actually be Little Kitty who will make Big Kitty's life miserable, by being so determined to make her a playmate. She jumps at her, attempts to play with her tail, gets under her blanket when she sleeps, and only backs off when Big Kitty hisses at her or even slaps her.
"There's no place to hide from this insolent little kitten!"
"I'm too tired to do anything else at the moment..."
I do hope they will work it out between themselves eventually.