Re: Selina Kyle's Sidekick (TDKR Spoilers)
I believe we last see her after Bane opens up Black Gate prison and all the criminals start rioting all over town. She's smiling, and we see Selina clearly upset about the whole situation. After that, she just goes away.
Clearly she was raped to death by all the inmates who came her way.
Don't believe everything I say.