Greg was surprised when he found out John and Mary had only invited him for the weekend. They were a sociable couple but normally he'd expect to make part of a group with Sherlock, maybe Molly or Mrs Hudson. He was pleased though, he sometimes felt like a bit of an appendage, a minor character who could fill up some space at a party. But this was John and Mary wanting to spend the weekend just with him. He was glad.

He drove down on the Friday night. He managed to leave pretty early compared to his normal time but it was already eight by the time he pulled up on their drive. He stretched his arms out in front of him, aching from the day. He'd had a meeting with his Chief Inspector that day and was in his good suit, his tie felt tight and uncomfortable at his neck.

He pulled open the car door and stepped out, reaching back in for a slightly bedraggled bunch of flowers. He wished he had time to find a better one but he knew Mary wouldn't mind. She'd smile that smile and say they were beautiful. Greg signed. She really was lovely. When she first turned up asking for Sherlock's help he'd nearly asked her out- those lips and legs and arse plus that smile and the low chuckling little laugh that often followed it. But it was clear she and John were made for each other, they were so similar in many ways, strong, caring, calm. They even looked similar, both short and fair with lightly tanned skin and big blue eyes. But whereas John's body was strong and muscled, (just because John was straight didn't mean Greg couldn't discretely check him out) Mary's was all soft curves. It was as if some playful God had taken the definition of his type and given him one of each gender to look at, but not touch. Once you added their new relationship into the equation Greg had been gifted a whole new series of fantasies involving John's strong hands on Mary's soft thighs, pulling her towards him… Greg shook his head. These were not things to be thinking when walking up the drive to see two recently married friends.

The door opened before he got to it, Mary stepped out of the warm glow and threw her arms around his shoulders, standing on tip toe to reach, "It's great to see you Greg," she murmured against his neck "we're really glad you could make it." Greg slid his hands round her waist and returned the hug, she smelt of cinnamon. "Oooh, what's that" Mary pulled back as Greg felt the sellophane crinkle between them, "Flowers? They're beautiful, thank you." John appeared at the door "Let the poor man in Mary, it's freezing out there". As Greg walked through the door John pulled him into a one armed hug and relieved him of his bag with his free hand, Mary had managed to pluck the flowers out of his hands and by the time the door shut John was tugging Greg's coat off, John's fingers warm where they brushed across the top of Greg's collar. Greg shivered a little, the closeness of both of them was going to his head, and certain other places. Well this is what you get, he thought, for daydreaming of warm tanned bodies and big blue eyes .

"Thank you for inviting me." Greg managed "It smells amazing in here Mary, what have you been cooking?" Mary walked back in from the kitchen, where Greg imagined she'd put the flowers "Just some lasagne, nothing fancy, though I did make some cinnamon whirls for you, John reminded me how much you like them." Greg smiled, just like them to have gone to the trouble. "I'm not sure it's going to be a sophisticated enough evening to deserve that suit , it looks great on you" As John spoke Greg felt strangely embarrassed, remembering the feeling of being looked up and down in a club. He had to keep reminding himself that John's appraising look was at the cut of the suit not what was underneath it. "Yeah, I had a meeting with the big boss so thought I should get it out of the wardrobe. Not the most comfortable work clothes I own though."

Mary smiled. "Shall I show you to your room then, maybe you could get a bit more comfortable before dinner?"

"That would be great, thanks."

Mary motioned him up the stairs and reached to take Greg's bag from John. As Greg ascended, out of the corner of his eye, he saw the couple exchange a look that he couldn't quite place. But it only lasted a moment and Mary was on the stair behind him, motioning him to a door on the left. Greg stepped through into a large bedroom, there was a king sized bed and a couple of chairs sitting near the end of it, an old wardrobe and chest of drawers. Everything about it was warm and soft, it felt loved and lived in, nothing like the slightly sad looking fold out bed in the second bedroom in his flat. Greg walked to the end of the bed and appraisingly pushed down on it, beautiful soft cotton, feather light duvet and a good springy mattress underneath, he was going to have an excellent nights sleep. "This is a great, I can't believe you've got a king sized bed in your guest room" Greg felt Mary behind him, reaching up to his shoulders to pull off his suit jacket for him "Well, we like our guests to be comfortable."

While Greg had been sure that John's eyes undressing him earlier had been in his head, the way Mary slid her hands slowly down his arms as she smoothed his jacket off felt much less like it was his imagination. Greg tried to think of the other times people had removed his jacket for him, he couldn't remember once such a sure sweeping touch running over his shoulders and all the way down to his elbows, before Mary finally tugged the jacket off. By the time Greg has processed this thought (large areas of his brain seemed to have shut down) Mary had hung his jacket up on the back of the door and was walking towards him. "Please Greg, sit" Mary gestured to the end of the bed and Greg sat down, Mary pulled a chair towards her and sat down facing Greg, She was very close now, one of her knees sat in between his, forcing him to open his legs slightly. The trousers Greg was wearing weren't tight but he was worried there was going to be some quite serious embarrassment if Mary looked down.

Mary picked up his hands from where they sat on the bed and drew them into her lap, she turned his left hand round and started undoing his cufflink. "Greg," she breathed, not looking at his face "there's a question I wanted to ask you, well something both John and I wanted to ask you." Greg gulped. The voices in his head had already started listing some very intimate and exciting questions that Mary could be about to ask, his answer to each of them being a very emphatic yes. Finding himself lacking in conversation skills he decided that that was as good a response as any "Yes?" he stuttered, his mouth dry and breath rasping. Mary pulled his cuff link through the sleeve and set it down on a nearby table, picking up his right hand and beginning work on that. "My husband and I love each other very much" she began "and we have, well, a very satisfying sex life" Greg's breath hitched, the voices in the back of his mind getting louder with every word Mary spoke. Mary pulled the second cufflink out and placed it on the table. She didn't drop his hand though, taking the now dangling sleeve and folding it upwards, stroking the thin cotton across his skin as she did so. "but from the beginning we've also both enjoyed other people." Mary picked up Greg's other hand and started repeating the folding motions. It was so soothing, assured, that it calmed Greg's yammering heart somewhat. "We always have a rule though that the other person has to be involved, even if they're only watching, It's too easy to get jealous otherwise."

Mary dropped his hand and looked at Greg in the eye. Greg realised that all the time her steady hands had been hiding her real emotions, her face was a picture of nervousness, her cheeks pink and her teeth tugging at her full lower lip. The look on Greg's face must have given her confidence though as she smiled, and reached out towards his tie. She loosened the knot. "John and I wondering, well, hoping really…" she was now pulling the tie from round his neck "that you might be interested in sleeping with us, both of us" she dropped the tie on table and reached up again, sliding a finger under his collar "or maybe you wouldn't mind if one of us just watched?" she popped open the button on his collar, then trailed her fingers down to the next one and undid that for good measure, raising goosebumps anywhere her fingers touched Greg's hypersensitive skin. Greg gasped as she took her hand away and lay it back in her lap. "So, what do you think? I know this is a bit full on but as soon as we saw you in that suit… well, we couldn't wait…" Greg looked at her, her teeth had found their way back to her lip, pearly white tips digging into the soft wielding pink flesh, Greg did the only thing he could think of, raised his thumb to her mouth and ran it across her lips. Mary sighed in satisfaction "Yes," said Greg, "I'd like that very much. Both of you, if that's ok…" Mary smiled and caught Greg's thumb with her teeth, he groaned as she sucked it into her mouth, lapping her tongue along its length. She held Greg's hand and pulled his thumb back out slowly, giving soft little suckles on it as it left. Greg took his wet thumb and trailed it down Mary's neck behind her ear. She shivered. "Hmmm, more than ok, much more than ok." Mary leant back slightly and smiled "John darling, could you come here please?"