L is for Living Together
Headcanon and scenarios for Sherlock, Mycroft, and Moriarty
The prompt: In which you live together as his S/O
Genre: Fwuffy fwuff
Rating: K+
Reader type: Considerate
SHERLOCK MASTERLIST
Headcanon for living with Sherlock as his S/O:
Sherlock doesn’t care about who lives with him as long as s/he doesn’t disrupt his life too much. That being said when it comes to having an S/O live with him, he’ll likely want it early on in the relationship.
Sherlock’s never truly experienced a healthy romantic partnership so everything will feel intense and serious right away (along with lots of awkward moments because he has no clue what he’s doing). When he acknowledges that he’s in love with you, he’ll start having you stay over more and more, and for longer periods of time.
He’ll clear out several drawers for you to keep clothes in. He’ll complain when you have to go back over to your place, and he’ll actively give you reasons to stay with him.
Eventually you simply won’t go over to your place for a month or so and you’ll realize such.
When you bring it up, Sherlock will comment, “Then you’ve noticed there’s no need for you return.”
“Are you asking me to move in with you?”
“Merely observing.”
So you make it official and move in with him and let everyone know. It’ll result in:
John wishing you good luck with a fervor.
Mrs Hudson staring at you in disbelief, then her face lighting up with joy at the thought of Sherlock finally settling down!
Mycroft silently wishing the best for you two (but his only outward reaction will be a raised eyebrow)
Greg wondering if you’ve lost your mind, but wishing you the best nonetheless.
Chores will have to be established early and agreed upon. Sherlock’s never really been one to pick up after himself, or really do much around the house. It’s unfair to put that entire burden on you, though, so he’ll try. He’ll do the dishes without a fuss, and he’ll take the out the trash. Everything else will be up for debate, though. You will absolutely have to do the cooking (if Mrs Hudson isn’t around) because Sherlock hardly remembers to eat, let alone make food.
Sleeping will be an oddity. Sherlock has an erratic sleeping pattern and as much as he wants to be able to sleep through the whole night beside you, he’s going to have some nights where that’s simply not possible.
He’ll leap out of bed sometime around midnight, his mind working furiously on something. He’ll pace restlessly outside of the bedroom, unintentionally making quite a bit of noise. If you’re supportive of his playing-the-violin-at-two-in-the-morning then he’ll be playing his violin. There are some nights where it can’t be helped and he’ll play with such a fever that no one can stop him until he’s done.
If he wakes you up during this he’ll apologize. If you have to work that morning, or a busy day the next day he’ll feel guilty and try to make it up to you. But if you decide to get up with him and join him on his sporadic burst of energy then he’ll be appreciative. He’ll enjoy your company and he’ll play whatever song you’d like on his violin.
His favorite pastime during nights like that, however, are playing board games or cards.
There will be some nights he won’t let you sleep at all.
Do not even try to get him up at a set time. When he finally goes to sleep nothing short of a bomb will get this bby boy out of bed.
It won’t be uncommon to wake up alone in bed only to find that he crashed on the couch after a restless night (he didn’t want to wake you coming back into bed).
On the nights he does sleep with you, he likes to be the big spoon. He’ll drape his arm over you and nuzzle into your hair.
Unless he’s having a bad night, then he’ll like to be the little spoon.
His experiments will be chaotic and messy. He’s not going to stop experimenting any time soon because it’s one of the few “healthy” things that can entertain him. That being said he’ll try to keep it to one (two) room(s).
He’ll go shopping with you. He’ll hate it and act grumpy about it, but he doesn’t want you to do it alone (unless you would prefer to do it alone). He’ll help carry the bags and put the food away.
This all changes if he can get away with online grocery shopping and have everything delivered.
John will still stop by on a regular basis to go on cases with Sherlock. They’ll continue to use the living room as the “client” room, so be careful of unexpected guests showing up.
Don’t walk around half naked because if a client sees you like that Sherlock’s going to give them a concussion. And that’s bad for business.
No privacy. Between Sherlock and his brother you can expect nothing of yours to remain private or hidden from the two. Unless you’re a better hacker / programmer than either of the two.
Surprise shower visits! Sometimes he’ll just come into the bathroom and talk to you while you’re showering/bathing. If you invite him in, though, he’ll usually accept the invitation (only time he says no is if he’s in a hurry) .
Everything important to him has a place. Don’t move anything unless you want him to sulk for a week.
He doesn’t care how you decorate the apartment. Don’t ask him to go furniture shopping because he will, without a doubt, pick the ugliest thing imaginable over and over until you decide to do it yourself.
He has a bad habit of throwing clothes near the laundry basket instead of in it. It’s a problem.
He is remarkably bad at cooking. He can manage burnt toast and frozen dinners, but everything else is as foreign to him as the solar system.
Is oddly picky when it comes to tea.
He’ll remind you of the weather every day before you leave. He’ll either hand you an umbrella, or force you into heavier clothes.
He likes it when you wear his clothes.
Wants a big dog, but will never get one on his own. He won’t object to you bringing a big puppy into the home (or lots of puppies), but he’ll get snippy if they mess up one of his experiments or lose their bladders inside the home.
That being said he’ll love to cuddle with them (and they’ll love him because all dogs love Sherlock because they can sense that he really needs all the love and affection). He’ll take them out for walks and spoil them with treats (but he won’t remember to feed him, that’ll be up to you).
He keeps a lot of candles on hand for blackouts. He has several emergency kits scattered around the flat.
Every time he sees you when he comes home, he’ll feel warm inside.
Sherlock Scenario
You rubbed the sleep out of your eyes as you quietly moved about the flat. You had to wake up early that day to go to an appointment, and Sherlock had unfortunately kept you up until three (you had to leave by five). You barely got a half hour of sleep in before your alarm went off.
Sherlock was still seemingly crashed on your bed, oblivious to the world around him. It was sweet looking at him like that; his face entirely relaxed and his dark curls falling over his eyes like a curtain. You wished you could enjoy it longer, but unfortunately the appointment really couldn’t be missed.
So you sucked it up and got ready. You moved slowly, tiredly, but did your best to keep quiet out of consideration for your sleepy boyfriend. You had only just grasped the doorknob when you felt a heavy coat on your shoulders.
Turning your head, you were surprised to find a groggy Sherlock wrapping a coat around you.
“It’ll be cold,” he mumbled, bleary eyes looking you over.
You smiled tiredly at him, slipping your arms into the coat. Sherlock reached over to the coat rack and grabbed his favorite scarf. He wrapped it around you before tugging it up to cover the lower half of your face. He leaned forward and placed a brief kiss on your nose.
You couldn’t resist leaning towards him, wrapping your arms loosely around his waist and closing your eyes.
He kissed the top of your head, whispering, “It’ll rain, too.”
“Thank you,” you said.
Sherlock pulled away long enough to put a hat over your head and to hand you his umbrella. You tilted your head back, closing your eyes expectantly.
Taking the hint, the tired detective gently placed his lips over yours.
“We’ll finish this later,” you said, pulling away.
“I look forward to it.”
Headcanons for living with Mycroft as his S/O:
Mycroft’s never entered into a serious relationship. The best that could be said about his past relationships were one-night stands, or things that had to be done for his job. He’s never fallen in love with any of them, and so has never courted someone with the honest intention of spending the rest of his life with her/him.
When Mycroft realizes that he does love you, it’ll cause some minor hiccups in his mind for a few days as he adjusts. When he’s finally ready to act on his feelings the relationship will turn intense very fast.
He won’t be subtle about his intentions, and he’ll be upfront about wanting you to live with him.
Mycroft won’t advertise this development. The only one who will figure it out within the first year will be Sherlock and he’ll give you a look of disbelief as if to say: Really? Him?
Chores will be done by the servants unless you absolutely want to do them. Mycroft likes having a clean and orderly home, but he doesn’t have the time to pick up after himself or clean it himself, so he hires maids that come in every day and tidy the place up.
He doesn’t eat or sleep in a traditional manner. Due to his work his schedule is a little whacked up.
The only thing consistent about his schedule is that he is always awake before dawn, and he always has a big breakfast. Lunch will be skipped without hesitation if he gets involved in his work, and dinners either don’t happen or occur extremely late at night.
Of course he will make it a point to try and eat with you (that’s what couples do, right?), but it’ll be a 50/50 on whether it actually happens. Every time he has to cancel he’ll send you flowers.
Sleeping will be the other sporadic part. Mycroft attempts to go to bed at a decent enough hour to get rest, but there will be times that that simply doesn’t happen. Still, he’ll make sure to tuck you in and lay with you until you fall asleep before he slips out and continues to work.
He will always be there when you wake up (unless he’s out of the country in which case he’ll send you a morning message).
On the nights that he does get to sleep with you he’s not prone to physical affection. He didn’t grow up with it, nor is he touch-starved enough to suddenly turn into a cuddly person. He won’t turn you away if you do you want to cuddle (and he’ll be happy to hold you if it’ll help you fall asleep), but he won’t actively seek it out.
Shopping will be done online and taken care of by the servants. He doesn’t have the time to do it, nor does he care enough to make the time.
No privacy. Between him and Sherlock you simply won’t be able to keep a secret.
He loves taking baths with you. Salt baths are his favorite as they’re one of the few things that he can relax to. He’ll make an evening of it if he can.
Mycroft prefers traditional decorum over modern. He’d prefer it if his home reflected that taste, but if you hate it too much he’ll be open to change. That being said you cannot change his library or office. He’ll get you your own rooms if you want to decorate them that bad.
He loves reading with you. Sitting beside one another in front of a fireplace and reading a good book is like his own private heaven (especially if there’s cake involved).
He’s a cat person. He doesn’t mind dogs, but he hates slobber. He likes cats because they don’t require constant attention (little does he know), but he’ll never get one on his own because he detests getting cat hair over his suits.
If you got a pet he wouldn’t object as long as it didn’t destroy his home or disrupt his life too much.
Of course the animal would either hate him or love him. There is no middle ground.
He is a phenomenal baker. If he has the energy and time he’ll make beautiful desserts. There will be a few happy times where you come home and the entire mansion smells like a bakery because he got into the mood.
He loves seeing you eat his cakes.
Mycroft absolutely has a panic room, several escape routes, and some top-notch security.
He also collects antique swords.
Seeing you every day when he comes home will be one of the biggest stress relievers of his life.
Mycroft Scenario
You were enjoying a wonderful novel that night. It was storming heavily, and you could hear each boom of thunder clearly and loudly. The mansion creaked from the heavy winds, and most of the lights were out (your home was running on the back up generator by that point).
You had the fireplace going in front of you, and you were curled up on the couch and under a thick blanket. Occasionally the room lit up in bright white light when lighting stretched across the sky outside the large window, but for the most part it was bathed in warm light from the fire.
Another clap of thunder drew your attention away from your book for a brief moment. In that same instant you could hear footsteps behind you. Turning your head, you found Mycroft entering the room, surprisingly not wet.
‘Must have parked in the garage, then,’ you thought.
“Welcome home,” you said, smiling warmly at him.
“Thank you, my dear,” Mycroft said, walking around the couch so he was between you and the fire. He gestured towards your book. “Good read?”
“Mm-hmm. Did you eat?”
“Not yet,” he admitted. “You?”
“Was waiting for you,” you said.
“Then I shall not make you wait any longer,” Mycroft murmured, extending his hand towards you. You pushed back your blanket and placed your warm hand in his cool one. His fingers curled around your hand. He brought your hand up to his lips, kissing the back of your knuckles.
Another clap of thunder sounded, this one significantly louder and strong enough to shake you. You jumped in surprise at it, and Mycroft pulled you into him. He ran his fingers through your hair and said, “Now, now, my dear. No need to be scared of a sound.”
“You’re awful,” you said, although you were smiling from his light teasing. You could feel his chest vibrate from his quiet chuckles. He placed a kiss on top of your head.
“Simply the worst,” he agreed, “but I’m afraid you’ll be stuck with me for quite some time.”
“I suppose I can live with that.”
Headcanons for living with Moriarty as his S/O:
When Moriarty realizes that he likes you in a If-this-person-dies-I-will-lose-my-fucking-mind way he’ll bring you to his penthouse. He won’t really ask you to move in, so much as make it nearly impossible for you to have a reason to leave.
His clients only come up to the first half of the skyscraper, and the rest of the floors are dedicated to his private work and living space. The penthouse, the top most floor, will be where he wants you to stay, but you’ll have access to a few floors below.
Anything and everything you would ever need would be in that building, or promptly brought in at your request. You will be entirely safe there and able to do nearly whatever your heart desires (except leaving the building without Moriarty’s permission).
You don’t have to worry about chores or maintaining the home. He’ll hire maids to do that for you (or butlers if that’s what you want, he doesn’t care).
You moving in with him won’t be advertised. Certainly those who see you in the building will know, but you won’t really be able to tell your friends or family. He’ll convince you that it’s safer that way, and if—for whatever reason—you had to meet up with them then he’ll arrange a safe public area for you to do so.
Given his work he doesn’t eat and sleep in a typical sense. There are times (weeks even) where he’s able to work on a standard schedule, but there are just as many times where he has to forgo sleeping in a bed or eating anything other than protein bars.
When he has a standard schedule he will make it a point to eat with you at least once a day (usually dinner). On an erratic schedule he’ll send you little messages around the time to remind you to eat.
On a standard schedule he’ll sleep with you for at least six hours (it’s rare he’ll sleep longer than six hours straight). He’ll come with you to bed, hold you tight in his arms, and make sure you’re the first one to fall asleep. He’ll do his best to be there when you wake up, but that won’t always be the case. On a sporadic schedule he’ll make do with calling you when you go to sleep, and having you call him when you wake up.
Any and every time he has to cancel plans with you he’ll buy you presents, be that clothes, flowers, games... whatever strikes your fancy.
D o n o t t o u c h his collection of “shoes.”
He loves surprise shower/baths visits. Frankly, he loves any activity that involves being undressed with you.
If, goodness forbid, someone else saw you like that though (such as an unlucky servant walking in with awful timing) then they’re getting their eyes popped out, at the very minimum.
He loves music. Every time he’s home with you there will be music playing in the background. He’ll swing you into his arms and dance with you around the penthouse to it.
He loves slow dancing with you.
Best of the best when it comes to security.
Moriarty isn’t much of a pet person. Animals typically hate him (likely sensing his naturally sadistic nature), but he won’t care if you bring one along. As long as they don’t touch his music or shoes, it’s fine.
Decorate the place however you want. Make it pink like Barbie, or black like Metallica. He truly doesn’t care, so don’t waste your time trying to make him pick stuff out.
He loves sitting by the fireplace and watching it. He’ll enjoy it more if you sit beside him and cuddle.
If you’re ever cooking in the kitchen he’ll come up behind you and wrap his arms around you and watch. He’s not much of a chef himself, but he likes seeing you work with knives and fire.
If you greet him every day with warmth when he comes home he’ll give you a genuine smile.
Moriarty Scenario
It was around midnight and you woke up having to use the restroom. You weren’t surprised to see that he wasn’t in bed, knowing he probably had more work to do.
After using the restroom, though, you wondered if you should check in on him. You knew he appreciated it when you gave him a reason to take a break.
So you left your bedroom and headed to the office, but you found that it was empty and dark. Curious, you walked around the spacious penthouse before you finally found him in the living room in front of fireplace.
He was sitting crisscross, leaning back, and staring intently at the warm cherry fire. You approached him quietly, pulling the blanket off the couch as you passed by it.
Jim didn’t react right away when you placed the blanket around his shoulders, or when you sat down beside him. You scooted closer to him, and his arm wrapped around your waist and pulled you into him. You tucked your head into the crook of his neck and you felt him place a brief kiss on your forehead.
The two of you stared at the fire, watching as it slowly cracked and split the wood. Bits of ember and ash burned lazily around the wood, and sparks flew off it at random. The smell was calming, and the sound pleasing.
You weren’t sure how long the two of you stayed there, both completely at ease and enjoying the moment. You thought it couldn’t have been more than half an hour (you later learned it was nearly two), before Jim broke the silence by saying, “Let’s get you back to bed.”
“I’m okay,” you said.
But he didn’t say anything else, merely standing up and pulling you up with him. His fingers curled around your own and he tugged you closer to him. His other hand cupped your face and he kissed you softly. “I’ll join you this time.”
You smiled at that.












