A/N: Sorry for the delay. This one is set during John and Mary's wedding
Mary sat down at one of the tables with a small smile on her face, watching the guests dance and mingle. She thanked one of the passing waiters for her drink before continuing her people-watching. Her eyes caught John and Sherlock making their way across the dance floor – Sherlock following her husband with a scowl on his face – and then out of the door. She wasn't too fussed with where they were going; she'd known Sherlock wouldn't be particularly fond of sitting in a room full of people and she had been surprised when he'd said yes after John had re-invited him.
When they left she let her gaze trail across the floor and she met Mycroft's look across the room. He was stood in the corner with a glass of champagne in one hand and a beady eye on everybody else. Again, she wasn't entirely sure why Mycroft had wanted to come – he didn't look like he was wholly enjoying himself – but it was nice to see him again. She smiled and waved at him, and he looked a bit surprised before he gave a tight smile and a stiff nod in return.
"Having fun?" Mary glanced up as Greg slid into the chair next to her, a wide grin plastered on his face. She couldn't help but smile in response.
"Definitely." she said over the music. She didn't have to ask the same of Greg to know the answer: his dancing eyes and lopsided smile were plenty enough of a reply.
"Did you have the salmon?" he asked, and Mary shook her head.
"No, I had the chicken. Was the salmon nice?" she questioned and Greg nodded vigorously.
"It was delicious." he said, leaning forward and making sure Mary was listening. She smiled and chuckled.
"You're not drunk are you?" she asked, pretending to sound scandalised. Inside, though, she was grinning at the sight of the DI looking horrified.
"No! No I'm not drunk! I haven't had any drinks!" Mary lifted an eyebrow, and Greg avoided her eyes. "Maybe one or two..."
She grinned outright. "I'm kidding, Greg. I'm glad you're enjoying yourself."
The DI looked a little put out that she had been toying with him, but he couldn't keep the scowl on his face for long. He suddenly looked about the room for a few moments, before glancing back at the woman watching him with an amused expression.
"Where's John?" he asked.
Mary nodded to the door. "He went outside with Sherlock about two minutes ago."
"Ah." Greg answered. "It doesn't bother you?" he asked, looking more serious as he scrutinised Mary.
"What doesn't bother me?" she responded, frowning slightly.
"That John spends a lot of time with Sherlock."
Her frown deepened. "Why should it?" she asked cautiously.
"It shouldn't!" Greg said, voice rising as he hastened to convey that he wasn't having a dig at her. "They're just friends!"
A small smile tugged at the corners of Mary's mouth. "I know." she said reassuringly. "I don't mind that John sees Sherlock a lot. I know he loves me and I also know Sherlock is a big part of his life, so who am I to tell him what to do and what not to do?"
Greg studied her for a short while, trying to tell in his tipsy state if she was bluffing, before a wide grin plastered itself across his face.
"I knew he was going to marry you." he said, and Mary blushed. "I'm serious; his other girlfriends barely put up with Sherlock but you were the only one who even tried to befriend him, and I know that meant a lot to John. Sorry, I probably shouldn't have mentioned his ex-girlfriends on your wedding day. Not very tactful."
"Don't worry about it." she said. "Though I hope it wasn't just because I like Sherlock that John married me."
Greg waved his hand as if to dispel the comment. "There were other reasons, obviously." he amended.
"Obviously." Mary murmured, sipping her drink.
"No, no, no, don't do that." Greg whined, closing his eyes.
Mary frowned. "Do what?"
"That guilt thing. John's a good bloke–"
"I know. What guilt thing?"
"–and he loves you like mad–"
"I know. I wasn't doing a guilt thing."
"–actually, he told me about a month after dating you that he was going to marry you."
"I – did he?" Mary asked, a surprised expression crossing her face.
"Yeah. We met up for a pint and he couldn't stop talking 'bout you." Greg noticed Mary's blush and he smiled. "I asked where he thought your relationship was going and he instantly announced he was going to marry you."
"Really?"
"Mmm. He told anyone who'd listen. Now I think about it, he may have had a few drinks." Mary giggled as Greg continued. "But he kept saying you were the one and going on about how brilliant you were. We couldn't get him to shut up."
Mary smiled as she took a sip of her champagne. "He never said."
"I doubt he'd remember, to be honest. He really was quite smashed by the time I got him back to yours. You were away at the time, so you wouldn't have known."
"I don't think I've ever seen him drunk." Mary mused, trying to recall a time where she would have seen her husband tipsy.
"I've probably got a video on my phone, I'll find it for you later. It can be another wedding present from me."
Mary smiled. "I'd appreciate that video, I think."
Both of them lapsed into a comfortable silence, the sound of music and chattering filling their senses. Mary drank some more of her drink and put it on the table, tracing the lip of the glass with her finger and suddenly remembering she needed to give the pineapple juice in her car to her cousin. Her nephew was going on a school trip on Monday, and Alfie had asked her for some juice so he could pack it for his son. She didn't even know why she had pineapple juice, though something told her John kept it for when Sherlock visited.
Greg was frowning into his own drink, his alcohol-addled mind trying to decide whether to finish it and find another drink, or save it. He settled for downing it in one.
Placing the glass aside, he looked across at Mary. "He sings like a canary."
Mary glanced up. "Who?" she asked. "Alfie?"
"Who?"
Mary shook her head. "Who were you talking about?"
"John." he answered. "When he's drunk he sings. And he hasn't got a bad voice, actually."
Mary gaped at this new information. "I really need to get him tipsy." she said determinedly. "Why haven't I done this before?" Greg smiled and shrugged.
"Beats me. It's bloody hilarious, listening to him holler out the words to 'I Dreamed a Dream.'"
Mary started to laugh and Greg soon joined in, chuckling to himself.
"Why haven't you told Sherlock this?" she asked. "He could have put it in his best man speech."
Greg laughed again. "God, I should have. And Sherlock would have loved it seeing as John's one up on him after that time Irene Adler drugged him. Now that's a video you need to see, Mary."
"I'm sure I will." she said with a smile.
"He loves you, you know."
"Sherlock?"
"John."
Mary nodded. "I know, and you've said so already."
Greg took another glass of champagne from a passing waiter. "It killed him, y'know, when he thought you'd left him."
Mary's smile dropped. "I know." she said quietly.
"I don't think Sherlock knew what to do." the DI continued, oblivious to Mary's discomfort. "John would just stay locked in his room or lie on the sofa. Wouldn't say a word."
"It had to be done, Greg."
"Yeah, but he still worried us all for a bit. It was hard to tell what he was thinking beforehand, but then when you left he just completely shut us all off. It was horrible."
"It was hard for me, too." Mary muttered.
"Yeah, I kno – oh God, I shouldn't have said that. Sorry, that was completely out of line." Greg said quickly, leaning forward. "It wasn't fair on either of you, and I hate to think what it was like for you, especially as you didn't really have anyone."
"I had Jonathan."
"Well at least you weren't alone, then. Sorry. I'm glad it's over and done with, though."
Mary nodded. "I think we all are. Sherlock and Mycroft especially."
Greg hummed in agreement. "Wasn't a nice case."
Mary huffed. "Understatement of the year." she said and the DI grimaced.
"I think that's enough drinks for me." he announced, pushing away the champagne. Mary smiled slightly.
"Nonsense, you're here to have fun. Have as many as you like." she argued, sliding it back.
"Well, if you insist..."
"I do insist, it's my wedding." Mary smirked.
"If it makes you happy... Are you happy?" Greg asked.
"Of course I am. Why wouldn't I be?"
"Just checking." Greg said, sipping his drink. "You and John are perfect together, I hope you know."
"Thank you."
"Great personalities."
"Ta."
"Taste in food isn't that great, though."
"What?" Mary asked, frowning.
"Why didn't you have the salmon?! It was amazing!"
Mary laughed. "The chicken was just as good." she said.
"I seriously doubt that."
"Why are we talking about chickens?" John slid into the seat next to Mary, looking from her to Greg. He placed his arm across the back of Mary's chair and raised his eyebrows at Greg.
"I was telling Mary that the salmon would have been the better choice than the chicken."
John nodded contemplatively. "It was good." he reflected.
"See!"
John and Mary grinned, before she nudged her husband in the side. "Why haven't I heard you sing before?"
John looked thrown. "Why would you want to hear me sing?" he asked with a frown.
"Because Greg says you're good at it."
"When did Greg hear me sing?" he asked, glancing at the DI.
Greg lifted his chin and gave John a regal look. "You'll never know." he said airily, then suddenly darted from his chair and vanished into the crowd.
John stared after him for a few moments before slowly glancing across at Mary. "He didn't expect me to chase him, did he?" he asked. " And anyway, why were you talking about my singing?"
"No reason." Mary said. "Where's Sherlock?"
"He left. Dimmock promised him a triple murder."
"Ah, who could resist?" Mary smiled. John grinned in response.
"Who indeed? I'll pop round tomorrow, if that's alright?"
"It's fine." Mary assured. "Drink?" she offered her champagne glass, wondering whether she'd be able to get John drunk tonight.
John shook his head. "No thanks. Come dance with me?"
A/N: Next chapter will be the last I think x
