Right so here we go again with a new fic. This one is all fluffy and hopefully fun; with even a tiny bit of a Cabin Pressure crossover just for shits and giggles. I felt the need to go a bit more light-hearted after the complexity of my previous fic.

Anyway, enjoy. It's currently T rated but that may change as we go in; those that read my work know I like the smut. Just to confirm, I own nothing but my idea but am beyond excited to see what Mark and Steven have in store for us in Season 4.

Chapter 1

It was simple in Sherlock's mind; the solving of two problems with one solution, killing two birds with one stone, 2 + 2 = 4. He couldn't quite understand why Molly was taking so long to think about it.

It had all started early April when he had found Molly close to tears in the lab, reading and re-reading a letter. He pursed his lips and pondered whether to backtrack out of the door, before she noticed he were there, but then he closed his eyes and shook his head. She was his friend, she had rarely asked for much from him and he knew the right thing to do would be to ask her what the problem was. So, after a moments procrastination, that was what he did.

She looked up in surprise, 'oh hi Sherlock, I didn't hear you come in. Don't worry it's nothing.'

He came closer hoping he wouldn't have to hug her or anything else so personal, 'it's obviously not nothing or you wouldn't be so upset.'

She sighed and held out the letter to him, 'it's from my landlord. He's putting the rent up. Twenty percent...twenty percent! It was already expensive but now...I don't know Sherlock I think I'm going to have to find somewhere cheaper to live. I just don't want to spend that much of my income on rent...I can't.'

He glanced over the letter his mind already in overdrive thinking through the possibilities and implications. It didn't take him long.

'The solution is simple, move in with me.'

Molly looked at him; shock written all over her face, 'what?'

'I'm sure you heard me the first time Molly. Why does everyone always ask me to repeat myself? I said move in with me. John's old room is just lying empty and I was starting to think about looking for a new flat mate. You'd be perfect.'

'I'm sorry but in what universe would the two of us sharing a flat be perfect?' Asked Molly in barely disguised horror.

Sherlock turned and made his way to his favourite microscope, 'well, we already know each other for starters. I don't want the hassle of having to get to know someone new...it's always so tedious not to mention most people...well, everyone except John, moves back out within a matter of days. Plus you won't complain about me having body parts in the fridge given the fact that you're normally the person who gave them to me.' He caught a glimpse of her raising her eyebrows in disbelief, 'alright I get ALL of the body parts from you. Anyway, splitting the bills will help both of us but more than that I find...well, that I've missed the company since John left. We get on so why not?'

'I...I don't know Sherlock. I need to think about it.'

'Fine, well there's no rush as far as I'm concerned. The room is yours if you want it. Same rent as John paid.'

He gave her a figure and Molly's eyes widened. It was less than half of what she was paying at the moment...plus she'd be closer to work so would save on both time and money with her commute. But she'd be sharing with Sherlock. The very man she'd been crushing on for over five years. That wouldn't be healthy, surely.

She ended up going round to discuss it with Mary a couple of nights later when Sherlock and John were away on a case. They spent the first half of the evening talking about baby Elizabeth who was now almost three months old and it was only when she had finally fallen to sleep in her cot and they sat with a glass of wine each that Molly told Mary about his proposition.

'What are you waiting for take it,' said Mary as she took a gulp of wine; the one bonus to her having been unable to get on with breast feeding.

'But it's Sherlock. I mean the rent and location are great. I love the flat and having Mrs Hudson downstairs will be a bonus. But let's not kid ourselves Mary. I'm in love with the guy and he feels nothing for me. How healthy is it going to be living with him?'

'Well, maybe seeing him unshaven and scratching his arse in the morning will be just the tonic you need to get over your feelings for him. They say familiarity breeds contempt so maybe living with him will help you see him differently.'

Molly chewed on her thumb nail as she contemplated what Mary had said, 'maybe...' She didn't sound convinced though.

'Anyway I think it would be good for him having someone else there. You know everything that happened at New Year with the exile and the drugs. John worries about him sitting in that flat all alone with no company. I know he'd be a lot happier if he knew that you were there keeping an eye on him.'

Molly bit her lip and Mary sensed her victory, 'go on what have you got to lose. He's not tying you into any contract so if it doesn't work out you can just look around for somewhere else.'

'Well it would be so much better on my bank balance. It can't be that bad...can it?'

'I'm sure it's fine. Come on John lived with him for years and survived,' Mary felt a little guilty as she said this remembering some of John's tales about living with Sherlock but she was convinced that this could only be a good thing for them both. She had every expectation that given close proximity Sherlock would finally realise that Molly was perfect for him and would stop being such a stubborn wanker.

Molly gave it another few days but couldn't come up with any good reason not to take him up on his offer and as her deadline with her landlord loomed she sent Sherlock a text accepting his offer.

His answer came through fast.

Glad you saw the sense in it. Let me know when you want to move in and I'll make sure I'm out of your way. SH

She frowned, well this was getting off to a great start. No offer of help with the removal work then.

She at least fixed up to go round a couple of nights later and view her room. She'd never actually seen it during her previous, albeit limited, visits.

It felt a bit strange arriving and knowing this would soon be her new home. Mrs Hudson let her in and kissed her on both cheeks before hugging her, 'well I have to say it will be nice having another female in the house. You're welcome to pop down anytime you like for a cuppa, though evenings tend to be when I have gentlemen callers so you might want to knock. John was so upset when he walked in and caught me and Mr Nugent...well, these things happen don't they. Anyway Sherlock's upstairs but give me a shout if you need anything.'

As Molly went up the stairs she could hear him playing his violin. She was going to enjoy hearing him play more often. He was very talented but rarely played in public. In fact she'd only heard him twice before, once at that Christmas party and the other at John and Mary's wedding.

He broke off as she entered the flat, 'ah you're here. Feel free to take a look around. There's a set of keys for you on the table, you can move in whenever you like. Any questions?'

Molly had a few about the bills and how they would be split but Sherlock gave all the right answers. Then he offered to make her a cup of tea whilst she explored the room upstairs.

'It has its own loo and sink but you'll need to come downstairs for showers and baths. I'm not normally an early riser though so we should co-ordinate quite well in that respect.'

Molly wandered up the final set of stairs and opened the door to a surprisingly spacious room. There was a window at each end; front and back plus a door into the small en suite. She walked around thinking about her furniture and what she wanted to bring with her. There would be enough room for her bedroom furniture plus she could put her settee under the window at the front. It would give her her own space to sit and read if she needed it and she strongly suspected she would at times.

She heard Sherlock start to play again downstairs as she measured up and she smiled to herself suddenly feeling eager to move in sooner rather than later.

When she went back downstairs the cuppa was sitting waiting for her on the kitchen table and after picking it up she sat for a moment in John's old chair just letting the music wash over her. He was so intense when he played as though his mind were a thousand miles away. It allowed her to look at him far more than she was ever able too normally. The dying sunlight cast a golden glow around his head making him look like an angel or an apostle from a medieval painting.

He carried on playing for five more minutes before letting the tune come to a natural end then he put the instrument down and came to sit opposite her picking up his own cup.

'Are you going to be OK with Toby coming here?'

He frowned, 'whose Toby?'

She rolled her eyes, 'my cat.'

He shrugged, 'it will be fine. Mrs Hudson loves cats and I have no objections so long as he doesn't come into my bedroom.'

Molly nodded wondering how easy that would be. Laying down a rule to a cat was just a challenge to be broken but she didn't want to say anything to put him off.

'Are you sure you're going to be happy sharing with me?'

He smiled, 'why wouldn't I be Molly?'

'Well, have you ever shared with a woman before?'

'Is that a roundabout way of asking if I've lived with a girlfriend Molly or a genuine question?'

She blushed but said nothing so he continued, 'no, I've never shared with a woman but I'm sure you can't be that much different from John. But yes I'm positive. I'm actually looking forward to it. It's been lonely these last few months and that is something I never thought I would hear myself say.'

Two weeks later and Molly had hired a man with a van, Icarus Removals. She'd spent the last fortnight clearing out her flat and sorting out everything she wanted to get rid of and the rest had been packed up and was ready to go. The two guys, Martin and Arthur, were enthusiastic rather than talented but they were cheap to hire and happy to help Molly with all the things she needed doing. She was embarrassed to realise she even found Martin quite cute in a dorky sort of way and on the basis that he looked far too shy to ever ask her out she gave him her mobile number and asked him to call her sometime...if he wanted to. His answering blush and smile told her that he did and she hoped he wouldn't leave it too long.

She'd agreed with Mrs Hudson that John's old furniture could be moved to the basement flat and she was pleased to see that Sherlock had cleared some space in the front room for her books and laptop etc. It was a long day and Sherlock was noticeably absent throughout but by eight o'clock that evening a weary Molly flopped onto the settee with a plate of cake and sandwiches that Mrs Hudson had brought up for her and she looked around contentedly.

She still had work to do upstairs. The furniture was all in place but her clothes were still in cases and needed unpacking but she'd worry about that tomorrow. For now she just needed food, drink and rest.

She finished the food and was just starting to doze off when there was a bang downstairs and she heard Sherlock make his way up the stairs.

She smiled to herself, here goes. Let the flat share commence!

And here we go, launching into a new fic. Let me know if you like the sound of it. Chapter two will be up in a few days.