Considering Prompto didn't actually answer the question, he just... went to grab the tea kettle. Less likely to burn the water if he can hear it whistle, and thus less likely that Ignis will kick his ass later.

"Wow, really?" He asked, raising an eyebrow as he filled the kettle with water. "And here I thought it was obvious." Because even from the kitchen table, it was kind of hard not to notice the large red wings jutting up higher than the roofs of the other houses behind theirs.

It's kind of hard to miss, along with the cycle of the sun.