"Careful," Orion chided, swatting lightly at those faintly moving hips.

"I thought I told you not to move."

But he really couldn't object, because he had been about to do the exact same thing. Hands sliding up under Megatron's aft, Orion pointedly angled grey and black hips further up, giving himself unfettered access to Megatron's bared valve.

Engine rumbling, Orion licked his way up from the same spot as before, trailing around Megatron's static-laced valve.