John actually seems glad when Martin agrees, which has him smiling all the deeper, still sheepish, still ducking his head. He only looks up when John tells him to wait, and he does, a bit mystified but mostly feeling a sort of empty-headed anticipation, until John returns with a large cup.

Martin grins and blushes at the promise of spoiling and decadence, feeling a bit foolish but unable to deny the draw of it all.

"Oh?" he says, as coy as he can manage under the circumstances. There's no real challenge to be leveled here, not even for play: John already treats him better than anyone ever has, and this is already a level of... if not decadence, care greater than he's ever received. But it doesn't matter. Challenging isn't the point. Playing along is. He shifts his position a little, the water lapping around him, and he says agreeably, "Let's have it, then."