There's not playing fair, and there not playing fair.
This is the italicized one.

He nods twice to answer her questions.

Slow and steady breathing is a wonderful thing. If he ever gets home, he's totally going to thank his sensei for teaching him...on second thought, maybe now isn't the best time to be thinking of one's father.

Especially not when one is using one's highly trained ninjitsu to maneuver one's lover onto her back. Though, he is true to his word, he doesn't make a sound.