Leo was your brother.

sure he was funny but he is also overprotective.  It was always "(y/n) careful." Or "(y/n) dont play with that Knife!"

You and Nico have been friends for a long time. You had a crush on him. Just a little one.

Okay a huge crush!

But you wouldn't tell him for two reasons

1: you were scared that he might reject you and it will ruin ur friendship with him.

And 2)

Leo...

He'd kill Nico. He said you couldn't have a boyfriend until after you got married, had sex, and have kids, and then die. But like how is that supposed to happen!? But you really liked Nico!

Later...

"Dare" you said bravely.  You were playing truth or dare , or as you like to call it candor or dauntless, with the 7 and Nico. 

Piper smiled ear to ear. "I dare you to kiss Nico in the closet"

"Oooooooooooohh heeeeell noooooo!" Leo shouted

"Its a dare Leo now sit your butt down" piper snapped at him. Leo obeyed as in a trance.charmspeak! You thought.  You got up like Nico and went to the closest. 

"Sooooooo..." you were blushing like crazy.

"W-w-e kiss." Nico stuttered.  He leaned forward and you lean in too. Your lips touch his.  They were warm and soft.  Your lips moved perfectly.  He cupped your cheeks and you placed your hands on his chest. Ever thing was going perfect until...

Leo opened the closest.  He was shocked at the sight. He yanked Nico by the hair and sent him flying to the other wall. "OW!"

"Nico!" You cried! You run to him but Leo carried you over his shoulder. 

"Not a chance." He turned to Nico "stay away from my little sister, death boy" with that he walked out the door.

"LEO YOU CANT DO THIS!!" you screamed, kicking and squirming.

"I can and just did"

You arrived at the cabin and he let you go. You ran towards the door but Leo got in front of it. "No" leo looked at you. "(Y/n), you can not date Nico. Not in a million years.  Even after I'm dead!"

"But Leo! This isn't you! You would just let me go and live my life"

"I am very protective of my friends and family"

You turned away and went to sleep. "Leo Valdez I will date Nico someday and you will no separate us!"

"Well you first gotta date the guy"

The next day

You got up before anyone. Quickly you went to the hades cabin. You were wearing loose shorts and a regular shirt. Your hair was in a messy ponytail.

"Nico?" You knock.

"Nico it's me (y/n)" still no response. "Leo's not here" almost immediately the door opened. "Hi"

"Hello"

"Look I'm sorry about yesterday.  I didn't think leo would hurt."

"Don't worry it didnt hurt much" he looked at the ground.

"Can I come inside?"

" well y-"

"Thanks!" You stepped inside. And walked past Nico. Nico closed the door and stood Nico to you. "Nico I have to tell you something"

"And that is..."

"I-I guess I should tell you that I-I-" Nico didnt let you finish the sentence.  He put his arms around your waist and kissed you on the lips. Your arms wrapped around his neck and you kissed back. You stayed like that for a while.  Nico was a good kisser after  all. Then he pulled away.

"I need to do that sorry"

"Nico... I love you" he looked at you.

"I love you too" you were so happy but then you remembered Leo.

"Leo..."

"Oh right. But can't you convince him?"

You shook your head tears were forming. "No. He's a jerk he never understands! Ugh I hate him!" Tears rolled down you eyes.

"Dont cry" Nico use his tumb to wipe your tears. Both his hands were on your cheeks. "It hurts me when I see you sad." You looked at his eyes and he looked at you. You had to look up a bit because he was taller then but not that much, you buried you face on his shirt. He hugged you meanwhile you cried.

"(Y/n) you better not be in here!" Leo swung the door. You were so surprised that you stumbled back but you fell and Nico came down with you. Nico landed on top of you.  his arms landed next to you head.  That was the most awkward position.  Leo busted into flames. Litterally. "Nico get off my sister!" Nico was to stunned to move. Leo yanked him away from you. You got up.

"Leo stop! Nobody is stopping me to date him! Just let It go leo!"

  "No! No. Next thing you know you'll get married and have children.

"So? It my life!" Leo looked down. A tear ran down his cheek. Nico got up and stood next to you.

"I-its just I can let go. I want you to be my baby sister forever.  I dont want you to leave me. Your the only family I have."

"What about the others leo?"

"Ya I guess but you my little sister. I guess I dont want you to grow up and leave me" tears ran down his cheeks more now. You ran over and tackled him in a hug.

"I'll always be here Leo. I'll always be your little sister. I just want to date. You cant stop me from growing"

"I wish I can" then he looked at Nico. He broke the hugg and went to Nico. "You do something to her, break her heart, or make her cry I'll toast you like a chicken. You understand?" Nico shook his head yes.

"Nico!" You jumped on him. You hugged him so tight.  "Thanks Leo. " you and leo fist bumped and he left.

You were now cuddling with Nico. "I love you" you said sleepily.

"I love you too and nothing will separate us"