"Yeah, long... time." Bowser, of course, knows exactly how long it's been since the fight between Kaiba and Iwaizumi, except for what was a approximately an hour between when he saw the fight and when he figured out time now had to do with water. Her choice of words, though it's likely to be a coincidence, makes him wonder if Ann also is aware of this.

"Have you used any of the water, since Mementos?"