OK, what happened to Selina Kyle's sidekick, the slightly younger looking and petite assistant played by Juno Temple? They both lived with each other, and seemed at least to be very close friends or may even have possibly been casual lovers. Juno's character was presumably saved from a rough life on the streets by Kyle and seemed like her pupil, with Selina teaching her cat burglary. She just seemed to disappear by the wayside when Selina Kyle made a new life with Bruce Wayne. That's one more minor plot hole/loose plot thread in The Dark Knight Rises for nitpickers to pick over.
"Whose tank is this?" "It's not a tank, baby, it's a tumbler." "Whose tumbler is this?" "It's Bane's, baby." "Who's Bane?" "Bane's dead, baby. Bane's dead."
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.
Over the course of three movies and 7+ hours, the filmmakers gave us all of three female characters (as in persons with more than two or three lines of dialogue - no Bruce's mother and that TDK cop don't qualify), all of whom were romantically and/or sexually linked to Bruce Wayne. Selina's friend wasn't. Ergo, the filmmakers didn't care about her, and didn't expect us to, either.