More than once he caught her staring with a worried look on her face. He would quickly flash his knowing grin, half genuine because of the satisfaction he got from knowing she at least spared a moment to look, half annoyed for making her worry. She would reply with a smile and go on with whatever she was doing, unaware of how distracted he would be after.
While she was healing someone from about a good distance away, or while she was talking to whoever she may have come across the street, or while she was peeling a piece of fruit during her breaks, any moment she was unaware of his presence became a mission to seek out her eyes till it eventually met his. Most days it took a few seconds, but some took longer. He could look at her all day, but perhaps he never imagined himself to be a useless Hokage. He would set his sights on his tasks, be it the growing paperwork on his desk, or whatever matters he had to attend.
Perhaps tonight he would take his slow time and kiss her senseless the moment she greets him at the door. Perhaps he would want to shower with her before eating dinner. Perhaps she would protest that the food will get cold, and he would have to use his lips on her neck, and his hands beneath her skirt to win the argument. Perhaps they would skip dinner altogether, as his hunger was not the kind that food can sate. Perhaps it did not matter. He would go home later and would want and love anything that may happen.