Requested by AwkwardSunset
Not many people know this, but the infamous Harley Quinn has a little sister. Her name was y/n. She was six years younger than her. After Harley's task force to save the world with the squad, she was back to Belle Reve. Funny how after saving the world, they still sending her ass back in the highest security prison. The Joker broke her out. They lived together in the clown's penthouse. Harley asked her puddin if she could bring her little sister to live with them, after a few puppy dog eyes, the clown finally agreed. Today was the day y/n going to move in with the king and queen of Gotham city. "Sister, you're here! Muaahhh I missed you so much" Harley said in excitement as she pulled her in for a big kiss on her cheek the moment she got out of the car. "I missed you too, Harleen" "No no no no no, it's Harley" Harley immediately corrected. Y/n had to admit, the Joker did change her sister that y/n almost couldn't recognize her: pale skin, pink and blue on her hair, her outfit, the way she walks, the way she talks. Everything. Standing in front of y/n, wasn't her sister she known for 20 years, it was a completely different person it actually scared her. She'd by lying if she said she didn't miss her Harleen. God, what had that freak done to her. How could she let him manipulate her to this point? How could I let this Harley talk me to living with them?!
"C'mon, sissy, I want you to meet someone" Harls giggled as she grabbed y/n's hand and dragged her inside the penthouse. The henchmen followed behind, carried her belongings inside. "Wait" Y/n stopped her sister in tracks "What is it, sweetie?" Harls asked "What if... what if he kill me?" There no need to say who y/n was talking about. Y/n was nervous... who wouldn't thought. This was the Joker she was going to meet! However, Harley looked at her like she had just asked the most stupid question "Don't be silly, y/n! He's the sweetest c'mon" With that, Harley continued to drag her through the hallway. The Joker, sweetest?! Clearly all the psychologist my sister had now long gone.
"Puddin, she's here" There he was, the king of Gotham everyone afraid of. The Joker was sitting on the couch, his back facing them. Y/n swore he could hear her heart beating so loud in her chest. He growled and y/n felt like she was going to faint just by the sound of that. Then he slowly turned around to face them. Once Joker and y/n's eyes met, they both felt that weird feeling in their chests, the feeling they had never felt before.
Y/n knew Joker was a psychopath. He manipulated and he killed. She used to question how on earth how does her sister fall for someone like him... maybe she understands now. There was no deny that the Joker was handsome, y/n saw it uncountable times on TV, but she never thought he'd look this attractive in person. But that wasn't the point. What makes her heart race not in the same way it did before she made eyes contact with him was something more than just the good looking. It was the feeling she couldn't describe. Like he captured her whole heart and soul in that blue orbs of his. The first second she look at them, she got lost in it. The Joker never wanted Harley to bring someone with her at first, but agreed just so she would shut up. He even had his evil plan to manipulate this y/n and kill her off later. However, once he saw y/n's face, he knew she was different. There was something about her that makes his heart race, no one ever managed to make the Joker felt like this before. Not even Harley. He doesn't know what is it about her, she wasn't prettier than Harls, but why couldn't he shake the feeling off of his chest. The clown felt like he could look at every single detail of her face forever. Neither Joker nor y/n said a word so Harley decided to break the silence "Puddin, this is y/n. Y/n, puddin" Harls introduced. Before y/n could say anything, the Joker walked up to her. He took her hand in his and placed a soft kiss on it "Y/n" J purred. The way he said her name made that feeling in her heart got even stronger. Damn you stupid heart. "Oh I'm looking forward to see you, kitten. You're gonna be my friend" J spoke and y/n could felt her cheeks turned red. "Told ya he's the sweetest" Harley winked at her.
The three of them were having a dinner in the dinning room. Y/n sat across from J while Harley sat next to him. Apparently y/n found herself never wanting to look anywhere, but at the clown's face. She had to pretend to look down at her food so it wouldn't look too obvious. Little did she know every time she looked away, the Joker's eyes suddenly made its way on her. Once they were done with their food, y/n offered to wash the dishes... J waste no time in offering he'd help her. "Puddin, I thought you'd rather get shoot 10 times than doing this" Harley said, surprised, but before she could say anything more, the phone rang. Y/n noticed her sister's face expression changed once she looked at the caller ID, and she suddenly excused herself. "Who's that, Harls" Joker asked, but Harley was already left, looking so overly excited at whoever calling. Weird. Y/n thought, but shrugged it off. She was now alone with J. Y/n thought being alone with the Joker would be the most awkward situation everyone wouldn't want to be in, but to her surprise, being alone with him wasn't as bad as she thought at all. In fact, they talked about whatever: favorite movie, some silly jokes from the Joker, and y/n was laughing with him. Their hands slightly touched as they washed the dishes. God, what are these feelings?
Y/n couldn't help but get jealous as she watched the Joker and Harley kissed. Stop it, y/n. He's your sister's boyfriend!! And he's the Joker, he was probably manipulating me right now. Like he did to Harley. Y/n told herself and walked away. Though her heart still hurts like hell.
The Joker couldn't help but sense something was wrong with Harley. Ever since he got her out of Belle Reve, she had been acting weird. He noticed she'd sneaked out of bed at night and talked to someone on the phone for hours. He could even hear her giggle from outside the door. Of cause Harley thought J was sleeping, well the Joker always slept with one eye open. She even went out without his permission, which wasn't like the old her. When he asked, she'd say she was with "friends". The Joker had a feeling this was some of the squad members she joined in that god damn saving-the-world task. He wanted to think his suspicion was wrong, however, it was proven to be right one night...
Tonight y/n was having a night out with friends, Joker was at his club. Harley told him she wasn't feeling well, and would rather stayed home. The pink and blue girl expected the clown not to return home until past midnight as usual, boy, she was wrong. The Joker had that feeling he felt when something wasn't right, and decided to follow his instincts. He left the club early, and went straight to the penthouse. The more he got closer to his place, the more he felt something was seriously wrong. J growled as he speeding through the city. Once he got home, he waste no time going to his bedroom. J doesn't even bother to knock as he swung the door open.
The sight in front of him made him forgot how to breathe: on the bed, his bed, a naked man was on the top of Harley's naked body. They both jumped in shock. The man turned to Joker. Once J saw his face, he knew exactly who he was: Floyd Lawton aka Deadshot. His suspension was true. Hell he knew it had to be this dude, but, still, seeing the scene right in front of him made his blood boiled. J grabbed the pistol from his holster and lunged at the two of them, pointing the gun at Deadshot's head. But of course, this was Deadshot, the most skilled assassin, he would never leave his gun out of reach. The hitman was fast to grabbed his gun, and pointed it back at the Joker's head. "Whoa whoa whoa calm down, man. It don't have to end like this. We can talk. Look, I'm sorry" Deadshot tried to calm the Joker down, he wasn't in the mood to fight the crazy clown. Thought he knew there was no way this would end pretty. Hell anyone in the world would have the same reaction as the Joker if they were in his shoes. Especially, out of all the people in the world, this was the Joker's girlfriend Deadshot screwed with. J was panting hard, all he see was red. They both stood still, holding each other at gunpoint. All these left was who will be the fastest to pull the trigger. Harley was in shock, but when her brain processed what was going on, she suddenly rushed in to stand in between the Joker and Deadshot. "Puddin, please let me expla-" "SHUT UP OR I'LL BLOW YOUR BRAIN OUT YOU BITCH!" The Joker yelled in anger, cutting her off. Harley flinched. She had seen the clown lose control many time before, but it was never like this. The anger in his eyes burned through hers like never before. "Harls, get out" Deadshot spoke from behind. "Floyd Lawton hmm? Tell me pretty pretty pretty pretty, baby, was he good? Did he satisfy your needs? Were you scream his name like you used to scream mine? Was he a better fuck than me?" The Joker fleshed his infamous sadistic grin at her "Tell me, baby, was it felt better to have his dick deep inside you? Better than mine? Tell me tell me tell me tell me..." Joker kept purring the words at her. The way his words sank in her head, the way his eyes burned hole through her, all the mind games he was playing with her, everything. All of this was too much for her that she suddenly lost it, and snapped "STOP IT!!" Harley yelled at J. Took Deadshot by surprise at her sudden outburst. Surprisingly, the Joker didn't yell back or hit her, he just stood still with that sadistic grin. "I'm sorry, puddin, but I can't live like this with you anymore" Harley spoke, her voice got soften, and tears ran down her cheeks. "You turned me into someone you wanted me to be, someone I'm not. Floyd, he... he understands me. He loves me for who I am, and I... I love him, puddin. I didn't want it to end like this between us, but I just can't keep doing it anymore. So if you wanna shoot me, do it, but please, after everything, if you ever cared about me for at least a second, please don't hurt Floyd. I'm sorry, baby" Harley expected Joker to get mad, to scream, and put bullet through her head. What he did was something neither Harley nor Deadshot expected at all: there was no yell, no slap, nothing. The Joker dropped his gun. Harley looked at him, confused. This wasn't like the Joker at all. "Go" J said, his voice was surprisingly calm. "W-what?" Harley couldn't believe her ear. "You want to be with him? Then go" However, what Harley did next caught the Joker off guard: Harley pulled herself into him and hug him tight, but they both know it was a goodbye. The Joker could felt her tears ran down to his shoulder. He wanted to hug back, but he couldn't "Goodbye, puddin" Harley said before finally let go. She put on her clothes, and walked pass him, out the door, out of his life forever. Deadshot wanted to say something, some kind of apology because he still felt it was all his fault. He knows it was his fault, he just stole someone's girl. But love had no right or wrong. After a moment of awkward silence between him and the clown, Deadshot decided it was best not to say a word so got his clothes and followed Harley out.
Joker found himself standing alone in the middle of the room he once shared with Harley. He couldn't actually tell what he was feeling. He should be sad, but he wasn't. He was angry the moment he saw her with Deadshot, but it wasn't because she replaced him, it was more like he was angry because he felt like she disrespected him. That his pride and honor had been crashed down by that hitman. Being disrespected was the thing he hated most. He wanted to shoot Deadshot, the only reason he let him go wasn't because of Harley or he was afraid he couldn't pull up a fight with him. It was because he actually want someone to take her from him. He doesn't know why he was feeling like this. Usually, he never wanted anyone to touch what was his, but after he met y/n, he doesn't feel the desire to own Harley anymore. Right now he felt empty, mostly because all the confusion he felt right now. Why wasn't he mad? Why wasn't he jealous? Why would he just let Harley walked out with her affair without doing anything? Was it because of y/n had already taken Harley's place just like Deadshot took his? Speaking of y/n, she was probably going to left too. Of cause she would. Why would she still stay with him, when her sister ran away with that Deadshot dude. And he suddenly felt sad for the first time that night at the thoughts of y/n leaving. Thinking of probably never get to see y/n again was like a knife stabbed at his heart, and the clown felt like he doesn't have the energy to stand anymore so he let himself sank to the ground. Sitting alone in the darkness.
Y/n just got back from night out with friends. Once she got to the penthouse, she saw Harley leaving with that guy with her who y/n assumed was one of squad who went on that task force with Harls since she thought she saw on sometimes on TV. Y/n could tell something is definitely wrong. What is it that both Harls and the dude wear such less amount of clothes? "Harls, what's going on?" Y/n questioned. "Pack your things, y/n. We're leaving" "What? What are you talking about?" "You're gonna live with me, but not here anymore. I'm sorry, but this isn't the time for introducing. Just pack your thing, I'll explain in the car" Y/n looked at her sister, then at Floyd. By now, she could piece the picture at what was happening. "Harls, Joker is gonna kill you for this!" "No, he won't" Harley shortly replied. And for some reason, y/n suddenly worried about the clown, knowing her sister's affair was a highly skilled assassin. "What? Harley, what did you do to him?" The anger in her voice surprised Harley she stopped in her tracks. Even y/n herself was surprised at why would she care so much for the clown. Harley went silent for a moment then she realized why her sister was so angry at the thought of Joker getting hurt, y/n swore she could see that small smirk on her sister's lips "He's fine. He's in the bedroom. Now, sister, I was wondering, would you still like to come with me?" Y/n was caught off guard at Harley's question. "I saw the way you looked at him, sis. And I saw the way he looked at you too" Now her smirk was getting wider. "Harls, we're not-" Y/n tried to explain, but Harley cut her off with a hug "No no no it's okay, really" as Harley pulled away, she gave y/n the address she'll be living with Deadshot "In case you wanted to live with me again" She winked, but then her playful expression turned back to the sad one she had moment earlier. "I'll miss you" Harley said as she hugged y/n again, tighter than last time. Even though she wasn't Harleen anymore, she still knows y/n way too well at what she was thinking. Y/n hugged her back "I'll miss you too"
Y/n watched as Harley and Deadshot left. Sooo now what? Why didn't I go with her? What was I thinking? That J will gladly let me live with him now that Harley's gone. And the thoughts of not having Harley to protect her from the clown suddenly ran through her head. Great! now he's going to kill me, and there'll be no one to stop him from doing it. Nice decision you made, y/n. Letting your little fantasy took control over you. Y/n wouldn't dare to go upstairs to face the clown. Especially not knowing what mood he was in after what happened so she just stayed in the living room. Part of her wished she could stay here in the living room while J stayed in the bedroom forever so she doesn't have to face him. That's when the sound of scattering glass from upstairs made her jump. God, what was he doing up there? Was he okay? Y/n hated herself for caring so much for him. She tried to ignore the urge to go check on him to see if he was okay, but she couldn't. Y/n sighed as she slowly made her way to the bedroom. You're gonna get yourself killed, y/n. She slowly peeked through the door, though it was dark, she could saw the clown sat in the middle of broken glass. Y/n gulped, knowing the stupidest person on earth wouldn't walk to the Joker when he was like this, however, she pushed the door open and walked in. "M- Mr. J?" Her voice was small and shaking. The Joker now acknowledged her presence. He looked at her, eyes bloodshot. Y/n hesitantly approached the clown and sat in front of him. "Your sister doesn't live here anymore, ya looney tune, you can still catch up on her. She wouldn't be too far now" He smiled at y/n, but it wasn't his signature smile everyone afraid off. It was a forced smile that y/n could see the pain he tried to hide. "I know, I, umm, I was wondering if you don't mind me staying..." Y/n stuttered. But before she could say anything more, the Joker pulled her in, and planted a film kiss on her lips. Y/n eyes widen in shock, but eventually her eyes closed as she found herself kissing back. They pulled away after awhile. Y/n saw the pain in Joker's face was no longer there. She had no idea how relieved J was hearing she wanted to stay with him. "Now, pumpkin, I'm never letting you go" He said while holding her face in his hands, pulling her in for another kiss as he whispered in the kiss "You're mine"
Harley was happy with Deadshot while y/n was happy with the Joker. Funny how at first, J didn't even want her in his penthouse, now he'd never want her out of his life.