She did cheat a little on her promise. Right around the time her stomach growled, she ran home to make a quick dinner. Once she and Minato were fed and she explained her earlier promise to him, she went right back to the hospital as the sun set. Either he hadn't woken up, or he had and gone back to sleep when he found her missing. Whatever the case, she settled in the chair next to his bed, watching him carefully.

Or as carefully as she could as the room got dark. She swore she saw some kind of movement, so she took a chance and whispered over to him.

"Obito, you awake again?"