"Mycroft, wake up!" A small body launched at the bed, landing on top of Mycroft, who woke up groggily.

"Sherlock! Get off of me!" Mycroft attempted to sit up but was impeded by his brother, the duvet, and the still sleeping Greg Lestrade.

"It's my birthday!"

"I know it's your birthday."

"I'm twelve."

"If you want to be thirteen, get off of me." Mycroft was somewhat uncomfortable and Sherlock was dangerously close to kneeing him in his painfully hard morning erection. Mycroft freed his arms from the bed covers and held Sherlock away from him.

"This room smells funny." Sherlock giggled and squirmed as Mycroft bench pressed him so the smaller boy was suspended two feet above the bed. "Does it smell of sex?"

"Do be quiet Sherlock."

"I bet it does. "

"Does what?" Greg turned over and was surprised to see Sherlock floating above him.

"Smell of sex!" Sherlock repeated it gleefully. Mycroft let him back down on the bed so Sherlock was resting on top of him.

"Sorry, he's obsessed!" Mycroft moved gingerly, feeling Greg brush against him.

"Isn't it your birthday?" Greg asked. Sherlock was bouncing gently on top of his brother.

"Yes, I'm twelve!"

"Well happy birthday Sherlock!"

"Thank you. I'm going to see if there are any presents. Are you going to have sex again? If you are be quick, we're having a birthday breakfast." With one final bounce he slipped off the bed and excited, slamming the door. Mycroft let out the breath he had been holding and got out of bed.

He stretched himself out and from Greg's point of view on the bed it did look like the exaggerated stretching was mainly for show. And Greg was certainly enjoying the view of Mycroft's broad body with its bulky muscles and gently rounded belly. Greg's own erection was tenting the bedclothes. He smiled and drew back the covers to show Mycroft what was on offer.

"I really have to use the bathroom!" Mycroft looked apologetic as he said it and made a quick dash for the ensuite. A few seconds later Greg heard the distinctive sounds of cursing as Mycroft tried to pee. He returned a few minutes later, looking slightly more relaxed.

"Is that better?" Greg ran a hand down his stomach and gripped himself gently.

"Much!" Mycroft joined Greg on the bed once more, lowering himself down until their erections were touching.

"Hang on!" Greg knew he wasn't going to last long with the combination of Mycroft and his rather full bladder to contend with.

Mycroft rested a little more of his weight on top of Greg and his probing hardness pushed up against Greg's belly button. Greg slipped his hands around Mycroft's back and slid them down to grip his backside. Mycroft moaned and shivered a little before lowering his while body onto Greg. He was heavy and the pressure of his weight pressing down almost made Greg shoot his load right there and then. He gripped hold of Mycroft's buttocks more firmly, trying to communicate without words what he wanted. The thick cock was sliding between his legs now, brushing the underside of his balls. It was good. But not what he wanted.

"Mycroft. Inside me, please..." he managed to grunt out. Mycroft pushed up a little and lifted Greg, and then there was the beautiful burning as Greg felt himself being entered. Somewhere at the back of his mind Greg was trying to get his head around the finer implications of it. That whilst it was nice to screw Mycroft and be up to his balls in the big boy's velvety arse, it was so much nicer when Mycroft's thick meaty cock was thrusting in and out of his own hole. Greg wondered what his friends at school would think. He found that he didn't really care.

Mycroft's balls brushed against him and broke his train of thought. He stilled for a moment, pausing to make sure Greg was comfortable and then began thrusting. Greg gripped tighter, encouraging Mycroft's thrust to increase in their brutality. Greg wanted to be thoroughly pounded. He could hear his heart beating in his ears and Mycroft's ragged breathing and the loud creaking of the antique bed. As Mycroft writhed on top of him, Greg moved his hand to rest between the cleft of Mycroft's buttocks. It was something he'd read about somewhere. Then he pushed two of his fingers into Mycroft.

The bigger boy gasped, his eyes flying open and looking down at Greg for a moment, before the eyes narrowed and the thrusting picked up pace. Greg pushed his fingers in further and felt Mycroft clenching tight around them and then suddenly Mycroft was coming. A series of jerky thrusts and hot sticky wetness escaped him as he shuddered into Greg before collapsing on top of him, breathless. There was so much stuff it felt as though Mycroft had just wet the bed.

"What was that?" Greg tried to push Mycroft off.

"I don't know." Mycroft, it seemed, was unable to move. Greg's own erection was squashed between them and Mycroft's heaviness was slowly squeezing Greg's bladder in to submission. Greg made a mental note to get Mycroft on the scales to see exactly how much boy flesh he was dealing with as he heaved him off.

Mycroft still lay panting on the bed when Greg returned from the bathroom. The sheets were a mess, covered in the result of the previous night's activity as well as Mycroft's monster orgasm. Mycroft had rolled onto his back and Greg could see his stomach and chest were covered in thick ropes of semen. He straddled Mycroft, letting his cock trail through the mess on Mycroft's belly. Mycroft moaned and arched up against him, soft, sticky flesh pressing against the hardness. Greg stroked himself a few times and then felt his balls tightening as he climaxed.

Greg was looking down at the mess, transfixed, when there was a knock at the door.

"Will you boys hurry up? Sherlock wants to open his presents." Mercifully Teddy did not open the door.