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Y/N Potter and Regulus Black were a weird pairing in most people’s eyes. Both being the younger siblings of the two most popular guys in school, it made their peers raise their eyebrows. Not to mention, they were in rival houses and seemed to be on opposite sides of the war. But they just worked.
Y/N was a lot like her older brother, James; very loud and loveable. She was naturally talented on the quidditch field and loved to make friends. It was obvious that she had relationships with people of all the houses due to her outgoing attitude and warm sense of humor. While Regulus also played quidditch, he was much more introverted and shy. He didn’t have many friends, due to being categorized by his surname automatically, so he often kept to himself and spoke only when necessary. Y/N was the talker, Regulus was the listener.
Funnily enough, Y/N and Regulus met through the means of getting Sirius to make amends with Regulus again. Regulus had cornered Y/N in the library and begged her to help him come up with a plan to talk to his brother. They ended up meeting multiple times in the following weeks and grew to be friends.
Regulus adored her ability to be interested in small things; she once asked him what a necklace he wore meant. It didn’t mean anything in particular, but she sat and listened to him speak about his jewelry for almost 15 minutes. No one ever took the time to listen to what the younger black sibling had to say.
To their ‘plan sessions” in the library, Y/N always brought a strawberry jam sandwich to munch on. They met after her quidditch practices, so James and Sirius wouldn’t find them, which meant she needed a snack to keep her energy levels up. She always offered him half, which the rather regal would decline nearly every time. Nearly. Regulus found her little snack absolutely adorable, especially when the jam got all over her face. It made her lips even pinker, and that much more kissable.
The sandwich became an inside joke between the two quickly. Even when passing in the halls, they would scoff and find the most outlandish way to mention the food. It wasn’t funny in hindsight, but it was something that connected the two in its ridiculousness.
~
Regulus paced back and forth among the bookshelves of the Hogwarts library, hoping to bump into his now best friend, Y/N. The library was near empty, as it was Friday night and very close to curfew, so even just looking for her held very little hope. She had mentioned something about having to finish an assignment she was procrastinating, so Regulus hoped she followed his advice to just get it over with.
The bookshelves were high and blocked most of the ceiling in the room, making the books impossible to read. Long, vertical shadows cast their darkness over almost every inch of the floor and offered very little light to allow him to navigate the maze of shelves. During the day, of course, this was a different considering the wall of windows that looked over the courtyards. The window seats were some of his favorite places to come and think. And the seats just happened to be his and Y/N’s meeting spot.
Regulus was about to give up on his search, but he noticed Y/N hunched over an astronomy book, sitting on the floor with her back leaning against a bookshelf. He casually slipped next to him, offering a shy hello.
“Hey, Black. What are you doing here?”
“I was about to ask you the same thing, Potter. Not exactly the best studying environment.” Regulus tilted his head back until it hit the books and turned his head to see her.
“Well, I’m trying to save myself from having to do this entire project tomorrow. I have a book, yet you appear literature-less. What’s your excuse?” Y/N moved so she sat with her legs crossed, the thick book laid open on her lap.
“I came to return this, you left it at our last meeting.” He placed a slightly toasted strawberry jam sandwich on the book. It was wrapped lazily in a green napkin and left an abundance of crumbs on her homework. Upon further inspection, the words will you be my girlfriend? were scribbled messily on the paper in black ink. Y/N’s jaw grew slack as she looked over at the highly attractive man next to her.
“You don’t have to if you don’t want to, but I just wanted to ask.”
“Are you being serious?”
“Dead, Y/N.”
A smile crept over her features and she held out half of the sandwich. “Suppose we can start our relationship with a snack?”
Regulus accepted the food, making a subtle crunching noise as he bit into it. “I suppose I can make the exception to eat your exceptionally plain choice in snack food, just this once.”
~
“I’m sorry, you’re dating who?” James laughs, shrugging his younger sister off before grabbing his broom.
By this point, Y/N and Regulus have been sneakily dating for more than half a year and Y/N was tired of hiding their relationship. After Regulus and Sirius had failed to rekindle their relationship, Sirius shoved his brother even further away than they started. It hurt the younger black to the point of giving up, but even he was tired of hiding their relationship. He loved Y/N with his entire being, and his jerky older brother couldn’t ruin that.
“Have you ever even talked to Regulus before?” Sirius adds, grabbing his own broom to prep for quidditch practice.
“Yes, and I am dating him. Not sure what’s so hard to understand about that.”
“We understand it, just don’t believe it. Now, don’t speak about things you don’t understand.” James kicked off the ground and flew in the direction of the quidditch pitch.
“Don’t understand? Excuse me?!”
“He’s right. I know you were just trying to prank us, but joking about something that personal isn’t funny, Y/N.’’ Sirius mounts his own broom and flies off after James.
After practice, Y/N hurried to the library to meet her slightly anxious boyfriend. Regulus knew you were telling Sirius and James, and he knew they would react badly. Y/N saw Regulus sitting on the windowsill furthest from the door and hurriedly walked over.
“Hey! How’d it go?” He asked after Y/N pecked his lips and sat next to him. Regulus wrapped an arm around her waist and pulled her close.
“Not much to tell, really. They said I was trying to prank them and to not talk about things I didn’t understand. Honestly, I kind of wish they yelled.”
Regulus laughed and kissed her temple. “They’ll come around, I’m not exactly their favorite person so I can see why they don’t believe it. And I’m happy they didn’t yell because I know how you feel when people yell and I don’t want you to feel like that.”
“Holy shit! Get away from my sister!” James’ voice filled the area, Sirius quick on his heels. They must have been following Y/N after practice.
~
“Riddle me this, you want to spy for the order and potentially get KILLED?!” Y/N paced around the living room of Regulus and her shared flat.
It didn’t take long for Sirius to reaccept Regulus back into his life after seeing how he treated Y/N. At first, both older brothers thought Regulus was using Y/N to feed secrets and information to the opposing side of the war. They didn’t accept the couple and wanted Y/N to have nothing to do with the boy. But, after many feelings were hurt and various words were shared, they decided to give the boy a chance.
Regulus treated Y/N like a queen and made sure his girl knew how much he loved her. He wasn’t very good with words, but his actions spoke volumes. Flower bouquets were gifted periodically, as were small gifts that had a lot of thought put into them. During one of their study dates, he spent over an hour drawing a beautiful portrait of her. Not too long after, he gave her an entire sketchbook of drawings he knew she would love. Whether that was pictures of her friends, family, her favorite flowers, or something as mundane as the bench she loved to sit on, the gift had taken hours and hours of his time. It was obvious that Regulus was in love with his girl.
After graduating from Hogwarts, both Regulus and Y/N joined the Order of the Pheonix. Regulus still had heavy ties with Voldemort and his family, so Dumbledore asked him if he would consider being a spy for the Order. Even Sirius thought it was a bad idea. But, he had to prove that he wasn’t who he was raised to be. He had to prove himself to not only everyone around him, but to his inner soul.
“Listen, Dumbledore thinks that there’s a spy that infiltrated the Order and if I can find out who, maybe I can stop it. Think about it, James has a kid, a kid who is very valuable to you-know-who. We haven’t even spent a ton of time with him yet, but I know I can save him if I find the spy.”
“Yes, I realize that, Reg. But I can’t lose you in the process. We’re supposed to get married and have kids of our own and have a happy life-” Y/N takes a deep breath. “I can’t live without you.”
Regulus smiles a comforting smile, taking his girlfriend’s hands in his. “I know, darling. I’m not going anywhere. How about this,” He reaches into his pocket and pulls out a small ring box, presenting it to Y/N. “Let’s get married. I’ve never been a fan of the big white wedding…and all you need is a few witnesses and two signatures. I’m sure Sirius and James would be more than willing to witness. What do you say?”
Y/N gapes at her boyfriend. “Are you asking me to marry you?!” Regulus laughs and pecks her lips.
“I love you so much, Y/N Potter. You are the light of my life and I am so lucky to have you. You have brought me so much joy and really made me the best person I could be,” He wipes a tear delicately from Y/N’s skin. “I asked James for his blessing, too, after the last Order meeting. He said he was ecstatic for us. So, Y/N, will you marry me? We can eat strawberry jam sandwiches together for the rest of our lives.”
“Yes! A thousand times yes!”
~
“Hi, little one, I’m your uncle, Regulus, remember?- Ow! Not the hair!” Regulus sat in a suit in the parlor of Potter cottage with one-year-old harry in his lap. Y/N watched from the doorway, decked out in her white cocktail dress and heels. She couldn’t help but gush at the sight of her soon to be husband with a child; it felt so natural. Her heart swelled just thinking about watching him play with their own children.
“Yeah, he does that, keep him at a distance,” James responded, coming into the room. He was running late, as always, and was trying to tie his tie. “I can’t believe I’m witnessing my baby sister getting married!”
Harry gargled and reached his hands towards his father. “Dadadadada!!!!”
“I know, buddy, I’m right here. Hang out with your Uncle Reg for a while, yeah?” James responds, messing with his hair in the mirror. No matter how much he ‘fixed it,’ it all looked the same.
“It’s crazy how he looks so much like you, it’s like you copied your baby photos and made them come to life!” Y/N stated. Harry was almost an exact copy of James, but with Lily’s eyes.
Sirius came into the room, perfectly dressed with his hair tied back. “Well, are we leaving or not?” He asked, fixing the bowtie around his neck in the mirror for the 8th time.
“Pa’foo!” Harry squeals and squirms in Regulus’ arms. His grip tightens around the baby before pressing a kiss into his dark curls.
“No, not Pa’foo! Reg!” Sirius turned towards Y/N and whistled. “Damn, Reggie, not sure how you picked up this one! Look at the legs on her! Phew, lucky I don’t snatch you up myself!”
“Stop it! Can we please go?” Y/N swatted Sirius’s chest witch her bag, embarrassed.
James plucked Harry from Regulus’ lap and hands him to Lily. “Yes, yes. Sorry, let’s go!” James kisses Lily’s cheek and disapperates out of his house.
Y/N walks over to Regulus and offers him a hand. “Ready to go get married?”
“I’ve never been more ready, my love. “