You never really had any trouble with complying with Carlos' rules. Don't distract any team members, don't cause any trouble, no dating other drivers. In McLaren, you didn't have a problem because Carlos' team-mate was Lando at the time and Lando wasn't exactly your type, so you just ended up being his friend. The trouble however, started when Carlos moved to Ferrari at the beginning of the 2021 season. "Don't go anywhere, Im just going in to check on Mattia." Carlos said, leaving you in the middle of a hallway in the ferrari factory. "I won't go anywhere, I'll get lost if I do." After some reassurance, Carlos walked into Mattia's office. Although Carlos insisted the meeting would be a few minutes, it had already passed twenty minutes. You let out a groan in boredom.
You focused on keeping yourself composed as Charles Leclerc was literally sitting right next to you. "Excuse me?" You turned as the monegasque began to speak. "Do you work here?" Charles asked. "Oh, erm, no. Just a visitor." You replied. He nodded and turned back facing the wall. "Are you a fan? I think there's some fans allowed in here from time to time." Charles said. You shook your head no. "Nope, I'm Carlos' sister." Charles looked over and smiled softly. "Ah, so is that why you're here? He's in with Mattia?" Charles asked, pointing towards the door. "Yeah, he's been taking forever though." Charles looked you up and down, smiling as he took in your features. "So, you're Y/n? Lando told me about you." Your eyes went wide. "Probably not good things." Charles laughed and looked down to the floor. "No, not at all. A lot of stories about you drunk." You groaned and leaned your head against the wall. Lando had ruined your chances of scoring the monegaswue before you even met him. "No, no, I want to see this all in person." You looked over confused. "What?" you asked. "Let's go and see if you're actually like this. How about we go out for a drink sometime?" You nibbled on your lower lip, trying to hide the grin on your face but it was no use. Charles knew he'd just about won you over.
The door to Mattia's office opened before Carlos stepped out and saw you and Charles smiling at each other, before you both tried to hide the fact that you were. "So what is all this?" Carlos asked, vividly unimpressed. "Just introducing myself Carlos." Charles replied. Carlos laughed. "She won't be seeing you enough for you to introduce yourself." You squinted your eyes at your brother in disbelief. "I know what you're really trying to do, you can't fool me. I was your age once." It was getting tense between the two ferrari dircers and they hadn't even gotten on track together as team-mates yet. "You aren't that old mate." Charles joked but clearly at the wrong time. "Are you mocking me?" Carlos almost shouted. "Carlos, can you stop shouting at the man? You're making a scene!" You pulled at Carlos' sleeve but he wasn't listening. "I'll call Mama and she won't be happy at all!" You threatened. Carlos looked back as if he was being challenged. He scoffed at his little sister. "You wouldn't dare." You grabbed your phone from your pocket and clicked onto your mother's phone number, holding it up to your ear and waiting for her to answer and staring at Carlos all at once. "Mama? Carlos es estúpido!" You said walking away, undoubtedly going to town on how annoying he was being. The usual. "Ah, ah, ah, Mamá, no porque, tu hija también está siendo estúpida!" Carlos called following after his sister. Charles however, looked on amused at the Spanish bickering and couldn't help but have this magnetic like attraction to the young Sainz sister.
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After the hectic race that was Silverstone, you went back to your hotel room to change before you went to cleebbrate with the team. Thankfully, your room was in between Charles' and Carlos'. You had a connecting room with Charles which was helpful for whne Charles was sneaking in at night and for moments like this. Charles stared at you, taking in your beauty through the mirror on the dresser, but you could tell something else was wrong. "You okay?" you asked as you took off the ferrari jacket. "That stuff doesn't suit you." You squinted your eyes in disbelief of his words. "What? Last time I checked you still drove for ferrari." Y/n said. Charles let out a sigh. "Yes but I mean why can't you wear the number 16?" Y/n grinned and wrapped her arms around Charles' neck. "We both know why Charles, I have to wear the number 55 for the meantime." After a few more visits, the exchanging of phone numbers and of course social medias, Charles had managed to captivate the Spaniard enough to love him back. The relationship had still been pretty new, only a few months but you didn't really care. "I don't have a problem telling Carlos I'm dating you-"
"Yes but he'll kill me, he wouldn't dare hurt you mon cœur." You giggled and pulled him in for a kiss. "I wouldn't let him do that, my love. Now go back to your room before Carlos comes around." Charles smiled and walked over to the connecting door before locking it behind him.
After Carlos came around, you went down to meet up with the team. They all decided to go out and celebrate and of course, you decided to tag along as you had gone to the Grand Prix. Everything was going fine until Charles had a little too much to drink and completely forgot that you were keeping you relationship secret. He started to dance with you, tell you how much he loved you and in all honesty, you weren't used to it so you got yourself out of the situation by going over to the bar. Carlos was watching the whole thing unfold, he wasn't the slightest bit impressed. You spotted Carlos and decided to go and tell him you'd be going up to your room to go fecth something. "I'll be back in a minute! I forgot my phone!" you said loud enough for Carlos to hear. Charles, on the verge of being blackout drunk, followed you to the bar but got confused whem he couldn't find you. He turned and saw his team-mate, sipping on a beer by himself and he let out a huge, exaggerated gasp. "Carlos!" Carlos turned and saw Charles, stumbling towards him, making him let out a little laugh. "You cannot hold alcohol, mate." Carlos laughed before Charles said something Carlos couldn't even understand. "By the way mate, you need to back up. That's my sister you're dancing with." Carlos laughed as he downed another bottle of beer. Charles, his mind clouded with alcohol, scoffed and grabbed another bottle of Estrella Galicia. "I'm already seeing her, Carlos. You need to relax." He laughed. Carlos froze and set his drink down before turning to face Charles. "What did you say?" Carlos asked. "I'm already seeing your sister, about two months or something now." Carlos clenched his jaw and finished his beer before paying and leaving.
He stormed upstairs to where you were staying and just as Carlos was about to knock the door, you opened it, putting your card key into your purse. "Oh, Carlos. I was on my way down now-" Carlos backed you up and closed the door behind him once he got into your room. "What the hell is this I hear about you and Charles, eh?" Your heart stopped. What did Charles say? "What have you two been up to?!" He shouted. "Carlos, calm down-" Carlos cut you off. "Calm down? Are you seriously telling me to calm down?" he asked angrily. "Yes, are you deaf?" He threw his arms up in a fit of rage. "Y/n, you are seeing my team mate. Did I not have a rule for this?" Carlos asked. You folded your arms over your chest and looked away. "Maybe you did." you muttered. "Now Lando, I wouldn't mind Lando because I know for a fact he wouldn't dare do anything wrong but Charles? Do you know about his ex girlfriends? How quickly he moves on? He's a play boy in a ferrari car. Nothing special." He snarled. This hurt you. You didn't want to believe it but putting things into perspective, that's how it seemed. "Can we just not do this right now please? I just want to finally find someone."
Carlos continued on ranting for a good four or five minutes. You felt like a child being scolded with all these lectures. "Do you have anything to say for yourself?" Carlos asked. "I don't see a problem with it." You muttered. "Are you being serious?! I just told you what he is and you still don't have a problem?!" Carlos boomed, his loud voice echoing around the hotel room and undoubtedly around the entire floor too. "Carlos, again with the shouting, can you tone it down a bit?" You asked quietly. "Tell me why, why should I not shout when you aren't listening?" You stood up straight, and off the wall. "You think I'm gonna listen if you shout? If you're wrong, you're wrong! No matter how loud you say it!"
À knock cane from the door, making you groan. "See? Now I have to deal with the noise complaint!" You walked towards the door and turned the knob before you opened it, surprised to see who was there. "Charles?" You arched an eyebrow as Charles showed up to your doorway, Carlos still angry in the background. "Y/n! Mon cœur! I love you!" He slurred, almost tripping on the way in. "I want to marry you." He sang. Your expression softened at his drunken words. You looked over to Carlos who looked at Charles disapprovingly. "Charles, I don't think this is the right time." You told him sweetly. "It's always the right time with you my love." he said, kissing your cheek. Carlos tensed up and looked away, his hands moving to his hips. "I know, but Carlos is here right now." Charles sat up and looked over to the pissed off Spanish driver. He lifted his finger and pointed at him, causing confusion between both Spaniards in the room. "Ah, my team mate in law." Charles began walking towards Carlos, you tried to hold him back a bit but it wasn't going to happen. "Listen, mate, I don't like lying to you so I should be the one to tell you this-" Charles paused and Carlos stood in anticipation. "I'm in love with your sister."
You closed your eyes in annoyance and sucked your lips in. "Charles, let's get you to bed, huh?" Charles nodded and went to open his connecting door. You closed your eyes again as Carlos looked on. Everything made sense now. How you two were secretly hanging out, how you managed to end up dating, everything was falling into place. "This is the secret door, Y/n." Charles whispered to you as if Carlos wasn't right there. "Charles, please go to bed." He smiled, before going through and closing it behind him, leaving you alone with Carlos to explain everything. "Okay, I think I need to explain a lot, right?" Carlos nodded before grabbing his jacket and putting it on. "You do, but that can be done another time." You arched an eyebrow. "What? So you don't want to ask anything? You don't have a problem?" Carlos shrugged his shoulders. "I don't have as big a problem with him now." Carlos said. "He's my team-mate in law after all." He added, earning a smile of relief from you. "I'll be going but if I hear anything-" He paused. "Unusual, I'll be coming straight over." You felt embarrassed as Carlos made his joke. "Nothing will happen, he's drunk and I'm pretty much sober."
"Well make sure my team-mate in law doesn't die or something. He's kind of important to the team." you laughed a bit and nodded. "I wouldn't let anything happen to him Carlos, you don't have to worry about that."