Duh, Tamaki almost says, watching as the image is waved away. He didn't get to see who the two people are, but if it was two people sleeping, then...

"I dunno." Tamaki squints at Strange in the dim lighting, as though searching for some hidden motive on his face. His frown is a bit disapproving. "Are you a pervert, Merlin?"

He didn't really take Strange for a voyeur, but this is a bit suspicious.