#oldersister!sinclair!reader

𝜗୧ RED-HANDED | Steve H.

Based on an anon request - “Can you please write a Steve Harrington fanfic with the reader as Lucas’s sister and they had their relationship because Lucas’s mom doesn’t want her dating and they get caught by the Sinclair family?”

wc - 2.3k

pairings - bf!steveharrington x oldersister!sinclair!reader

warnings - angst (kinda?), bit of fluff, established relationship, secret relationship, no use of y/n

a/n - Wasn’t planning on posting this first but it was surprisingly easy to write. S1 or 2 Steve. Highkey didn’t proofread

To your mom, rules meant safety, keeping you out of trouble, and more importantly, keeping her sane.

Dating was an unnecessary distraction for a growing girl like yourself. A girl of intelligence and stature shouldn’t need to worry about such frivolous things. It was something that you could concern yourself with more in college.

This mindset had never been a problem. You were always a well-behaved child who was more than happy to respect her parents’ wishes. Your parents always worried about your younger siblings rather than you. The standards and goals that they had were always over achieved by you. Academics, athletics, responsibilities, and poise, you had all the boxes checked. You were that– angelic to them.

That was all true until you started dating the reputable Steve the Hair Harrington.

Steve was known for many things. Some good and some not so good. He was a popular heartthrob of a jock who caught your eye this school year. The two of you were partnered together for a chemistry lab. Something you begrudgingly had to accept. Who wants to work with the dumb jock? He ended up changing your opinion on him with his lame jokes and charismatic attitude. You knew who he was, but you didn’t care. His charming smile and words had you smitten.

Your parents saw that Steve was respectable yet a little loose. Something they knew they’d have to keep an eye on.

Your mother let you bend the rules a bit after a bit of pleading. You were a trustworthy daughter anyhow. Not to mention, your parents didn’t want you to miss out on the chances of teenage love. Puppy love as they called it.

Lucas was reluctant to your new boyfriend. His views on Steve stemmed off the opinions of his friend Mike. Which obviously weren’t the greatest. Steve was just an annoying airhead that he couldn’t stand. Every time that Lucas would catch the two of you together he’d roll his eyes and mockingly gag in your faces. You’d scoff and go back to fluttering your lashes at Steve.

Steve tried to cater to your brother but Lucas simply wasn’t having it. That was up until you finally convinced Lucas to come around. He reluctantly did so to appease you. You were his big older cool sister… Steve buying him some new figures sealed the deal.

Erica didn’t really care. She never did. She was more focused on playing out her Barbie and Ranger Dan affair to be worried about whatever you and Steve had going on. She occasionally did ask you about him. Only to see how she could benefit from the two of you.

Both of your siblings mutually liked to tease you about the matter. Especially at dinner time.

“Busy sucking face with Harrington?”

You’d gotten used to it after telling them to shut up a hundred times got annoying. They weren’t wrong after all anyway. You’d spend most of your time with him in your bedroom doing exactly that. ‘Sucking face.’

Your parents weren’t phased until it started affecting their household. That’s when the foot really came down.

It started off with small things such as, coming home past curfew, maybe one or two bad grades on a test, and becoming more short-tempered with your family. Things that were expected of a hormonal teenage girl really. Your mother’s final straw was you sneaking Steve into her house and you sneaking out. It was harmless, truly, but to her it was blatantly disrespectful. Your father agreed on the matter and sat you down about it.

At that point, Steve Harrington was completely off limits.

That didn’t stop the two of you though. It just meant being more quiet and precautious. Phone calls after ten, meeting at the movie theater under the guise of meeting friends, and being on ten toes all the time. Steve was more than willing to play things like this. He was overly obsessed with you and you were just as enamored.

This is exactly why Steve Harrington was crouched beside your bed hiding his face behind a Monchichi plushie.

It was a Friday night and just as boring as usual. Steve insisted that he had to come over, catch up on chemistry notes with Hawkin’s most brilliant. An overused lame excuse that you willingly fell for. As with anytime the two of you were ‘studying’… You’d take the chance to catch up and ogle one another instead.

You were perched beside the doorframe, checking to see who was up and if the coast was clear.

“Lucas on the walkie as usual?” Steve asked with wide eyes. He moved Monchichi away from his face to look at you. His hair stood up over the doll anyway. Very obvious.

Pausing to listen, you could hear the faint sound of your brother and his nerd friends yapping. Erica was in the living room, watching her beloved My Little Pony reruns. You close the door behind you before turning back to Steve.

You laugh as you walk over to him. “Coast is clear. You can stop your awful excuse of hiding now.” He scoffs before standing up and sitting on the edge of your bed.

“Awful? I think I was doing pretty good.” He flails his hand in mock surprise. You sit beside him and a peck a kiss at his cheek. He returns the affection by pulling you in by the waist.

“Y’know, Sinclair, this sneaking around thing is– kinda killing me.” Steve drags out the confession with absentminded circles to your waist. “I don’t wanna hide around your mom all the time.”

He sighs with his fingers tugging at the fabric of your night shirt.

You lean your head your head against his shoulder. “Steve you know it’s not that simple. My mom doesn’t want me dating. Period.” You a place a hand at his thigh as a solace of comfort.

“No, she doesn’t want you dating me–.” Steve rests his head against yours as he wraps his arm around your waist. He continues on. “I mean I don’t get it. I’m not some delinquent.”

“I’m athletic, popular and respectful. I have a car. A job. Hair with-” He vaguely gestures toward his hair. “Structure”

“That’s like…textbook perfection. Right?” He hushes his tone is disbelief. You snicker and press a kiss at his neck. “My mom doesn’t care about your hair, Steve. She just doesn’t want me dating someone slightly– older, or popular, or…”

He cuts you off. “Me, yea I get it.” He pulls away from you and falls backwards on your bed, arms spread out like a star. You fall down beside him.

Turning your whole body towards him, you put a hand on his chest and bring your legs up. The prominent frown on his face causes you to wince a bit before moving in closer. You hated seeing him upset. Especially over your situation.

“You know I love you anyways.” Your hand comes up to cradle his cheek. He turns toward you with a slight pout. You furrow your brows feeling as if you said something wrong, but he quickly reassures you with a kiss to the lips.

He kisses you softly with his hand digging into your hip. It’s slow and desperate, like he’s been needing to hear you say that for a while. You groan into his mouth as you lean further into him, fisting a hand at his sweater.

With the arm that’s still wrapped around you he scoops you over to lay atop of him. Your lips are still connected as he wraps both arms around you, fully showing you how much he needs you.

He pulls back with drunken smile on his face, hands wrapped tight around your waist. “I love you so much.”

“I know you do.” You give him a final peck before lying flat against him. His hands moves up and down your back as he relaxes into the warmth of you on top of him.

Three knocks at the door quickly catch your attention. The both of you freeze. You roll of Steve and fix your moussed curls back in place.

“Shit-” Steve tumbles off of the bed with a thud along with your Monchichi. You hiss at him to go towards the closet. He frantically grabs the doll and stumbles over to your closet, holding it tight as if it’s a shield.

Before you can even answer your door creaks open. “Baby?” Your mom’s voice cuts through the room like a knife. You can feel your heart pounding against the cavity of your chest like a jackhammer. “Why is your light still on? It’s pretty late to still be up.”

You quietly gulp and calm your nerves. “Early studying. Chem test on Monday. Didn’t wanna be behind on anything.” Your mom is silent as she eyes you up and down. You glance over to your closet door, closed and not a sign of Steve.

Her eyes land on the rumpled bed and the extra pair of shoes by your desk. Which she knows for a fact aren’t yours. “Is there someone else in here?” She fully steps into your with her hands on her hips.

Your heart nearly stops. “No, mama. Just me and my books.”

The sound of clatter from the closet immediately betrays you. You squeeze your eyes shut as you try not to internally scream.

Your mother looks back at you and crosses her arms. “Steve, get your tail out of that closet.” There’s a brief moment of a silence as you and your mother hold eye contact for a second.

She turns her head while still looking at you. “Now, Harrington.” Her tone raises. That tone you always hated to hear.

The closet door slowly creaked open as Steve’s face became more apparent. He held your Monchichi closely to his chest with an awkward smile. “Uh, hi–Mrs.Sinclair.” Steve waves toward in the direction of mom slowly.

She sucks her teeth before pointing for Steve to sit next to you. Like a prisoner walking to his own execution, Steve walks over to your side with his head hung low and Monchichi cradled in his arms. The bed creaks with the added weight of him.

“Steve!” Lucas suddenly appears at your doorframe with his walkie in hand. Steve waves back awkwardly. “Hey, kid…” Lucas brings a hand up to his mouth as he whispers into his walkie. “Guys, my sister just got caught by my mom with Steve Harrington in her room…totally crazy I know!”

“So how long has this been going on? Or has it never stopped?” Your mom steps closer to take a look at the both of you.

You raise your head in defeat. “We never stopped.” Steve brings a hand to his face to avoid the terrifyingly strict glare of your mother.

“We weren’t doing anything, mom. I swear.” You plead your case to make matters less worse. “It was my idea anyway, Mrs. Sinclair.” Steve glances at you to help.

“Yea, I bet it was.” She flashes him a glare before turning back to you. Erica suddenly appears behind Lucas with Ken and Barbie in hand. “I was wondering how long it’d be before yall got caught.” She scoffs to herself before nudging Lucas.

Your mother turns around sighs. “Go to your rooms.” They flee like mice to their respective places.

She turns back to you and rubs her temples. Steve swallows. “Mrs. Sinclair, I promise you that I care about your daughter and that I would do nothing to hurt her, ever.” You turn towards him with a faint smile.

His confessions falls flat with your mom.

“No more phone calls, movies, weekend plans, or afterschool plans until I say otherwise.” She turns to Steve with disapproval. “And you. I thought you were respectful but sneaking back into my house after I said no more?” She shakes her head.

Steve nods along. “Yea, I deserve that.” A painful wave of silence echoed out across your room. The disapproving glare of your mother was enough to make your skin crawl and beg for forgiveness.

“You can leave now, Steve.” He quickly moves from off of your bed and gathers his shoes. He begins to crawl out the window before your mother interjects.

“Through the door, boy.” Your mom sighs as she points the other way. He turns around and nods. “Of course, the door, you meant the door.” He scurries out of your room before stopping at the door frame to whisper an ‘I love you’ and ‘see you Monday’ You grin before looking back at your mother.

The obvious wear and tear of your Mom’s work tires her out to leave it at that. “We’ll talk later. With your father.” You silently nod.

Your mom leaves your room with a deep sigh and slam of your door. You fall back on to your bed and let out a much needed exhale. This obviously wasn’t going to be the end of you Steve. If this was the way you had to play thing, so be it. You could live with disappointing your mom a bit.

A tap at your window forces you to sit up and turn around. You trot over to investigate the sound.

Once again, Steve. You crouch down to slide your window up. “Steve, did you hear nothing that my mom said?”

He stretches his neck with a chuckle.“I just wanted to say goodnight, Sinclair. Not trying to sneak back in.” He steps closer to your window frame and pulls you in by the cheek for a kiss. You delightfully groan and kiss him back for feels like ages before he pulls back.

“Trust me when I say that I’ll keep sneaking around with you.” He gently pulls you down by the chin to give a tender forehead kiss before bidding his goodbyes.

“See you on Monday, I promise.” He playfully blows you a kiss before running off down the block to his car. You whisper yell. “I miss you Steve!”

You close your window after he waves back and sigh. In complete and totally infatuation you plop yourself onto your bed and squeeze Monchichi. “Oh, Steve…” you coo.

2nd a/n: I really love the concept of Sinclair!reader sneaking around with Steve especially with the support of Lucas and Erica. I highkenuinely wanna write a part two for this that’s Steve gaining the trust of your siblings and having them help him plan a date. Something that includes them. Like I just LOVE the sinclair siblings ugh.