Spoiler Why is Bane Talia's bitch? Bodyguard and friend, yes, but not her bitch. He set Talia's plans into action but everything else was his own doing which he probably took enjoyment in (breaking the Bat then forcing him to watch his precious city burn, hanging the Wayne reps on national television, the stock exchange heist, etc). Basically all the dirty work Talia wouldn't be able to do by herself. I don't see how that makes him her bitch, if anything it added onto him as a villain. Also take consideration into when Talia told him to spare Batman near the end, and he disobeyed her direct order and started beating on him again. And by threatening I mean physically not mentally.