Originally Posted by C. Lee
That's the way I saw it. Once she revealed herself he seemed to become , for lack of a better word at the moment, passive. Talia reveals herself, explains her story, and then says she is off to do her evil deeds. Bane doesn't ell her to do it. He doesn't imply that he has told her previously to do it. He stands idly by and takes orders from her (yes, he ignores them....after she is out of sight and would not know any better) as she drives off to finish the master plan.
You also look at the back story she tells, when Bane was risking his life to protect her in the pit when she was just a child, when he had no incentive to do so either. Which means he did it simply because he loved her, as she specifies herself. Now here he was again willing to go up in ashes just so she can "honor" her father by finishing his work.