Even without Orion's grin it'd have been obvious he was enjoying what was going on, which, on its own, was enough of a reward - it was both a pleasure and a boost to his ego that he'd gotten Orion here and got to see him start to enjoy it.

Flashing a grin as he knelt, not exactly directly at Orion, but easily seen, and his engine revving softly, Megatron knelt again and handed the box over, and now there was no thought of the possibilities of what Orion might want with it, or what might come next.

There were still urges to push, but having reminded himself that Orion needed some time, it'd been easy to settle into the proper frame of mind. He only needed to do.

Easy.

Comfortable, even with Orion's little miss earlier.