Maybe she was playing it up as a way to keep him focused, or to motivate him. Whether it was what she did, or just the nature of the threat, it definitely did the trick. "No, we can't," she agreed, "HYDRA has only one mission and they will do whatever it takes, at whatever cost, to obtain it. Get whatever rest you can, Dr. Banner, you'll need it."
Natalia rose to her feet and walked over the screen, closing the display and then exiting out. The SHIELD logo found its place again before going to sleep. She turned to look at Bruce, nodding her head and then made her way out of the conference room.