The corner of Greg's mouth hitched up and without taking his gaze from Mycroft, he lowered down and took Mycroft's cock into his mouth once more as his finger slid in just a little further into that warm space inside, sliding to the second knuckle this time before sliding out once more.

"That?" he asked playfully. "Is that what you wanted again? Or this?"

Sliding his finger in once more, he ran the flat of his tongue from the bottom of Mycroft's perineum to the tip of his cock matching the movement with the slow withdrawal of his finger.

Greg groaned, sliding his mouth down Mycroft's cock once, more as if it was a delicacy that needed to be savored.

"Christ Mycroft," he rasped. "I can't get enough of the taste of you."

Sliding his mouth down once more, he began sucking in earnest, savoring and groaning, his finger sliding in and out of Mycroft at a leisurely pace.