Talking about his alter ego was never comfortable for Bruce, but he figured that Christine would understand some of the physiological things that most people didn't.
"Some of the dreams I've had involved me trying to... merge... with him," he said. "I think the disconnect is largely a result of me trying to keep him suppressed. From what I've gathered, he is more aware of my activities than I am of his." And Hulk obviously didn't try to keep Banner under wraps the same way he did.