Author's note: This story contains some adult content. It's rated M so please read if you are old or mature enough. Thanks!

A Brother's Betrayal

Macy knew this was wrong. She shouldn't be doing this especially with him. But she couldn't help it. She wanted him so badly. Because they were pressed for time, they both didn't bother removing all of their clothes, only the necessary ones. And that's why Macy found herself laying on her back with her blouse unbuttoned and her skirt hiked up all the way to her hips exposing her underwear. He dipped his head down and kissed her hungrily. She ran her fingers through his curly hair and welcomed his tongue which aggressively invaded her mouth. She felt his fingers travel down her body and clasp the band of her underwear as he carefully brought it down her legs.

"How much time do we have?" she asked him as she spread her legs to accommodate him.

"Twenty minutes," he replied as he quickly unbuckled his belt and unzipped his pants.

"We better hurry," Macy said and in one thrust the boy impaled her.

He knew exactly what pace to give her maximum pleasure. He started off slowly but steadily sped up so that the brunette girl was now loudly moaning his name.

"Nick…yes Nick…yes…" she moaned loudly with each thrust he made.

Macy loved the feeling of him inside of her. It was remarkable how the pain she felt the first time they made love gradually evolved into pure gratification. She bucked her hips up to meet his and he increased his pace because he knew he was about to finish.

"Macy….Oh… Macy…" he said with each thrust. They were both at the height of maximum pleasure when Nick collapsed on top of her.

She was trying to catch her breath but she cradled him in her arms as he gently stroked his back. They laid next to each other for a couple of minutes but then Nick got up to put his clothes back on.

Macy followed suit as she reached for her underwear which was thrown to the floor. She knew she should feel guilty about having sex with him but every time they did it, there was no ounce of regret in her body.

"Macy," Nick said now seriously. "I think this should be the last time we do this."

"What?" Macy said disappointed but she was used to this because Nick always said this every time they made love.

"I mean this is wrong in so many levels. I think we should stop all of this…" Nick said. "And he's my brother, Macy…I can't continue to do this to him…"

Macy bit her lip because his tone was different from how he usually sounded when he felt remorse for their little trysts.

"Nick…I know this is bad but come on, you can't deny the fact that it feels so right to be with each other," she said as she walked up to him and kissed him lightly on the lips. She tried to turn her kiss into something more but Nick pushed her away.

"Macy, I'm serious this time," Nick said. "If you don't break up with him, then I don't want to see you ever again…"

"Nick you can't be serious!" she exclaimed.

"I'm dead serious," Nick said. "If you don't break up with him by this weekend then we can't do this anymore. I can't have this on my conscience."

She looked at him and she could tell that he was indeed serious with his words. Macy sighed because she could tell that he wasn't going to give in and continue with their secret affair.

"Fine, I'll break up with him," Macy said quickly.

"You promise this time?"

"Yeah, I promise," she said. "Now can I have a kiss?"

"Of course," he said as brought his head down to meet hers. Nick backed her up against the wall and his hands once again roamed all over her body. His fingers once again lingered near her underwear until he let one finger slip into her inner folds. If they didn't hear the door bell they would have had sex for a second time. But Macy heard his voice call out, "Anybody here to welcome me home?"

They both let out a sigh of sexual frustration. The two of them made sure their appearance wouldn't give any evidence of what they were doing before.

Nick was the first one to go down the stairs with Macy following close behind.

"Hey, Kev!" Nick said as he gave his brother an awkward hug. Unlike Macy who didn't feel any remorse after their little trysts, Nick always had a hard time looking into his brother's eyes after he made love to his girlfriend.

"What's up, bro!" Kevin said excitedly but he was happier to see the brunette girl who patiently stood behind his younger brother. "Macy! I'm so glad you're here! I tried calling you a few minutes before but you didn't pick up your phone."

"Oh, well…um…my phone died," she lied because of course that wasn't the real reason why she didn't pick up her phone.

"Well, you're the person I wanted to see the most," Kevin said happily. "Why don't you come over here and let your boyfriend give you some sugar."

Macy gave him a forced smile and made her way to him but she hesitated a bit as she made a quick glance to Nick who was looking away from the two of them. Nick couldn't stand seeing Kevin and Macy show affection to each other especially since he was in undeniably in love with her.

Kevin was about to kiss her lips but Macy knew that would make Nick upset so she turned her head quick enough so that he got her cheek instead.

Kevin was shocked by this but Macy wasn't really into PDA so he understood why she would do that even though they were only in front of Nick.

"So what were you guys up to?" Kevin asked them innocently. He had no reason to suspect anything was going on between them.

"We were…um…you know…uh…" Nick stammered.

"Studying for our GEOMETRY FINAL!" Macy interrupted Nick loudly.

"Wow, someone seems to be excited about geometry," Kevin chuckled. His girlfriend's enthusiasm for math never ceased to amaze him. He put an arm around Macy and placed another quick kiss on her cheek. Macy noticed the moment he did this Nick looked away with a clearly annoyed expression on his face. "So aren't you guys going to ask me how my first semester in NYU went?"

"Yeah, how were your classes and professors?" Macy asked him excitedly.

"All of them seem pretty decent," Kevin said. "Except Professor Connor. He's a typical old and cranky white dude. I feel like I'm going to have to start sucking up to him early on to get on his good side. But I got you guys some stuff. I hope you don't mind that I got you matching sweatshirts. I tried to look for another style for you Mace but none of them had extra small so I hope this would do."

He handed Nick and Macy both dark purple sweatshirts with the NYU symbol. It was really ironic because Kevin gave them something both similar. It was another thing they both shared. Now, Macy started feeling guilty about not being honest with him.

"Thanks, bro," Nick said while trying his best to mask his uneasiness. His brother was so nice…how could he stab him in the back?

But how did it get to the point that the always responsible and morally inclined Nick Lucas found himself screwing his older brother's girlfriend behind his back.

It all happened three months ago…

Three months ago

"Wow…it's been like four hours now and Kevin hasn't texted me back," Macy sighed. "In fact, I haven't heard from Stella either."

"Well, they're all in college now," Nick pointed out as he joined Macy on her bed. "What do you expect? Although I am quite interested on how Joe's doing. I wonder if he managed to get in trouble already."

"Probably," Macy chuckled. "But I mean you'd think Kevin would at least call me since that I'm his girlfriend and all! I know college girls can be crazy."

She was starting to worry.

"Macy, you know Kevin will never cheat on you," Nick pointed out. "He's such a loyal guy."

"That's true," Macy said. "Anyway we should continue doing our homework. We don't want Mr. Peterson to fail us again!"

But as was their custom, Macy ended up finishing her homework and much to her dismay, she also did Nick's work as well.

"Nick! How many times do I have to remind you what formulas to use!" Macy cried out. "I'm not going to keep doing your homework! You need to learn Nick."

"Come on, Mace," Nick pleaded with her. "If you do my homework, I'll give you exclusive JONAS information in exchange."

At first Macy thought about that but retorted, "I can have Kevin tell me all that. Besides it's not fair you take advantage of my math expertise. I'm suppose to tutor you not do everything for you."

Nick pouted his lips and begged her to continue their current homework habit but Macy wasn't giving in so Nick took it upon himself to resort into using Macy's weakness which he found out from Kevin was that she was very ticklish.

"Nick stop! I can't! I'm so ticklish! HAHAHAHAHAHAHAHAHA," Macy was laughing so hard now that she found herself laying on her back with Nick falling on top of her. She looked up at him because he stopped tickling her. Her heart began to race because Nick didn't seem to find anything wrong with their compromising position. Instead, she saw Nick lower his head and connect his lips with hers.

He broke away quickly because he didn't know what compelled him to do that.

"Nick?"

He quickly got off of her because he couldn't believe he just kissed her.

"I'm so sorry," he apologized. "I…uh…"

But Macy didn't want to hear his apology and said, "Do you like me?"

"What?"

"Nick, do you like me?"

He blushed because he wanted to yell and say of course he liked her. Ever since Macy stopped being a psychotic fan, Nick found himself becoming enthralled with her but because he was such a coward and couldn't make a move he let his oldest brother win her heart instead. It was tragic indeed.

He looked over at Macy who was still waiting for his reply.

"Yes…" he admitted shamefully.

Macy didn't know what to say because his confirmation made her feel strange. She wasn't upset that he forced himself on her in fact if she had to be honest with herself, she always harbored feelings for Nick ever since he met him. But her crush on him died down when she realized that there was no way Nick would ever feel the same way about her. So she was ecstatic when the oldest Lucas brother took interest in her. It was a gateway for her to forget about having any feelings for Nick.

"I should go," Nick said quickly. "I'm sorry again."

Macy wanted to stop him but he ran so fast and was out the door in a matter of seconds.

For the next few days, Nick avoided any contact with Macy. It worked well until one fateful night. Nick was in his room when all of a sudden there was a knock on his window. He was surprised to find Macy waiting on the fire escape.

"Macy, what are you doing here?" he asked her surprised and now concerned when he saw that she had been crying.

"Do you mind if I spend the night?" she asked him sheepishly.

"Of course, but why? What happened at home?" he asked her as he helped her inside.

"They're fighting again, my mom and dad," Macy said scornfully. "It was getting a bit too much. I couldn't take it. Now I can't wait till they finalize their divorce. At least there'll be some peace and quiet in the house again."

"Oh Mace, I'm so sorry to hear that," Nick said and gave her a warm embrace.

She nestled her head against his chest. She felt so safe with him.

Nick told no one about his secret guest because they were afraid that his parents would just send her back home but Macy didn't want to be in such a hostile environment. So he gave Macy his bed to sleep on while he took to the floor with a blanket and pillow.

"Nick?"

"What is it?" he asked her nervously because the scenario they were in was something he had been avoiding all week.

"You don't have to sleep on the floor," Macy said because she felt bad that she was hogging his bed. "Your bed is big enough for two."

Nick cleared his throat and tried to refuse, "N-no, it's okay. The floor is fine for me."

"Nick please?" she begged him as she now sat up to look at him. "I don't want to be alone."

He sat up too and looked over at her. She looked so beautiful even in the darkness. How could he say no? So hesitantly he made his way to the bed and lay down next to her.

It wasn't only Nick who was trying to fight any form of attraction because Macy was using all her will power to stop herself from jumping on Nick. His back was towards her as he positioned his body at the very edge of his bed. He didn't want to risk touching Macy in any way because he knew he wouldn't be able to stop himself.

She's Kevin's girl not mine, he kept saying over and over in his head.

Macy noticed that Nick was so distant. She needed to be comforted especially since she witnessed the heated fight that went on between her mom and dad. It was so heartbreaking to see her family fall apart. She wanted to feel loved and Kevin was miles away from her to provide any form of comfort and Stella, her best friend, was also living in NYC since she was attending FIT so the only one left was Nick.

So she slid next to him and embraced him from behind.

Nick's eyes went wide in shock when she felt Macy embrace him. He could feel her chest pressed against his back. And much to his dismay, his body began to react as he felt his pajama pants tighten.

"Macy, you need to let go," he said honestly. "Because I don't think I'll be able to control myself."

Macy gulped because what she said next surprised her and him as well.

"I don't mind…" she confessed.

He turned around to face her and stroked her cheek gently before kissing her with so much passion. He wanted to show her how much he secretly loved her. Their kiss deepened and he was surprised when she opened her mouth to accommodate his tongue which quickly made its way to meet hers. He was on top of her now and Nick felt Macy running her hands all over his body underneath his shirt.

Nick pulled his shirt over his head and when he looked into her eyes he had to ask.

"What about Kevin?" He really didn't want to bring in his brother's name into this but he needed to know how she felt about him.

"I care about him a lot but…"

"You don't love him?" he asked her hopefully.

She shook her head because she knew she should break up with him but Kevin was so nice, she couldn't bring herself to do that just yet.

That's all he needed to know and Nick helped Macy take off her shirt. He kissed her neck eliciting her to moan his name loudly. She felt his hand fumbling with the clasp of her bra but to no avail, his efforts were futile. Macy laughed because she could tell Nick was getting frustrated that he couldn't take off her bra but Macy easily did it for him.

"Ahhh," she moaned when she felt Nick gently knead her mound of flesh. The feeling of his hand on her bare skin made Macy very excited and she felt herself grow wet with desire as Nick gently massaged her skin. In the same way, Nick felt himself also become very excited as his member grew harder. Macy was moaning louder now because she felt Nick pressing himself against her and she felt it…oh did she feel it.

Her skin was so soft and even though she wasn't exactly blest with much cleavage, he didn't care because this was Macy…if there was any girl he wanted to do this with, it would be with her. Nick stared at her bare chest and he could have sworn his heart was beating so rapidly. He kissed her on the lips again and marveled at the fact that his bare chest met her skin directly. There was no longer any barriers between them. He kissed her forehead then the tip of her nose. Then he kissed her lips once more and then her chin. He moved to her neck and kissed her collar bone. And then she felt it—Nick's mouth on her breast. He first kissed it and nibbled it gently before sucking hard. She had to grab a pillow to muffle her cries of pleasure. She continued running her hands all over his body. She felt the muscles on his arms and she caressed his thick curls. Instinctively, her back arched so that more of her flesh could be in his mouth. Nick immediately took this as a cue to wrap his other arm around her to pull her closer to him.

Nick needed to catch his breath and he stared at Macy who was looking at him with lust-laden eyes. He knew they weren't going to stop with just kissing and bold touches. He wanted to go all the way with her.

"Macy, I want to see you…"

She looked up at him curiously because she didn't understand what he meant at first. He was looking at her already. How much more did he need to see? But then she realized what he was requesting because Nick was no longer looking into her eyes but at her lower region. Macy gulped because she never showed any one her whole body before but this was Nick –the boy she secretly harbored feelings for all along. So nervously she slipped off her sweat pants and once they were off she grabbed the waist band of her panties and with one quick and steady movement she took them off. And there she was laying before the younger brother of her boyfriend with nothing on her. She was giving herself to him freely without any reservations. Meanwhile, Nick could have sworn his heart stopped as he stared intently at the new area of skin that was just recently exposed.

Macy was so nervous. Was Nick disappointed in her body? She didn't want to know but she saw him staring at her lower region.

"Nick…please don't look," she said. "I'm so embarrassed."

She made an attempt to cover herself with her hands but Nick stopped her and said, "Don't be embarrassed. You're beautiful Macy."

Macy smiled back at him sheepishly as she pulled him down for another kiss. Nick tried to concentrate on their kiss but he led his right hand towards that spot and very gently he touched her there.

"Ahh," Macy moaned in surprised when she felt his fingers in her. "Nick…"

But he was too busy concentrating on the sensation of her warmth on his fingertips. He looked at Macy and she had the look of want and lust all over her face. He continued what he was doing until he felt Macy quiver and have her first release.

"Macy," he whispered when he finished and he gently kissed her on her lips. "Are you alright?"

Macy was breathing heavily as she recovered from her first orgasm. She nodded to show that she was fine and added albeit sheepishly , "Um…Thanks."

Nick felt himself blush. He didn't really know how to respond but say "…Your welcome".

He waited for her to catch her breath before they did anything else. So they laid together as Nick embraced Macy who was leaning against his bare chest. She could stay like this forever…just she and Nick. It was the best feeling in the world. Even though she still felt a little bit sensitive down there, she didn't want Nick to wait any longer because she could feel that he was still excited.

She looked into his eyes and said, "I'm ready…"

Nick took a deep breath as he took off this pants and briefs from his body. He did this without looking away from Macy's eyes.

He nodded his head to signal that he was also ready and he carefully parted her legs so that he can position himself.

"Nick, please be gentle…It's my first time."

And as messed up as it may sound, Nick was glad to hear this because it meant that he was going to take something his brother wouldn't have the pleasure in claiming. He was honored that he was going to take something of hers that she could only give one time. It made him feel special.

"Of course," he answered because there was no way he would ever hurt Macy.

It took awhile for Nick to find where exactly he was suppose to go but when he finally found the spot, he slowly guided himself in her. Macy felt it. And did she feel it because the sensation of him entering her caused her to yell in pain as she could feel blood rushing out of her.

"Macy?" Nick said very concerned as he stopped his progress in. "Are you okay?"

She couldn't bear it but she didn't want to worry Nick so she said, "It just hurts. Can we…um… stop for a second."

Nick nodded and he was about to pull out but Macy stopped him and said, "No, you can stay …inside of me. I just need to get used to it."

Nick nodded quickly. Because as much as he wanted to make Macy feel good he couldn't help but marvel at the sensation his manhood was engulfed in. It was so tight and warm and wet inside of her. He never felt this good before. But he listened to Macy and didn't move until she gave him her permission. So they lay together with Nick still inside of her. He kissed her forehead and her cheek as Macy tried to catch her breath. It hurt so much for Macy to feel herself becoming stretched from within. She was still really sensitive from when Nick's fingers were in her but now that his penis, which was of course wider, was in her she needed to adjust to this sensation. Nick listened to her breathing which gradually slowed down. He looked at her when she was no longer trying to catch her breath and she slightly nodded her head for him to continue.

So he positioned himself again and this time he slowly slid out but only to slide in once again. Macy tried her best to contain her cries of pain because it still felt uncomfortable for her but not as much as before. She could tell that Nick was enjoying the sensation of being one with her by the groans of pleasure that were coming out of his mouth. He felt really REALLY good. It was indescribable. If he knew before hand that this was how sex felt like, he would never have gotten that purity ring on his finger. He steadily quickened his pace as he felt himself close to finish and Macy was now slowly beginning to feel the pleasure of sex as she too gave in her moans of satisfaction. Nick knew he was close to climaxing. Macy was now moaning his name incessantly as she urged him to go faster and deeper. And then he felt it and he tried to pull out as quickly as possible from being inside of her.

And that was the first time Nick and Macy made love and began their secret affair.

That weekend, Kevin wanted to spend as much time with Macy before he headed back to college. Of course, he invited Nick to join them for the day as they went to the amusement park and the local zoo but Nick refused because he said he had a lot of school work to do but the real reason was that he didn't want to be there when Macy broke up with him.

Kevin planned a whole day ahead for him and his girlfriend so Macy arrived early the next day. He wanted to start off the day early since he needed to catch the 5 o'clock train back to New York that same day. When he was busy getting ready, she made her way to Nick's room.

"Are you sure you don't want to come?" Macy asked him again. "You get to see the tigers and panda bears. That's Kev's favorite."

"No, I think I'll pass," Nick said clearly annoyed. He was busy trying to write down a song that had been lingering in his head but he noticed that Macy was still standing by his door way. "Mace…"

"What is it?" she asked him.

"You're going to do it today, right? I mean he's leaving tonight so you have no other choice," he asked her uneasily because he really hoped that Macy was serious this time when she promised to end things with Kevin.

Macy hesitated before she said, "Yeah…I'll break up with him."

He walked over to her and held her hand and said now in better spirits, "Good. Because you don't know how bad I feel for betraying him. Just let him down nicely. Kevin may be childish at times but he has a big heart. But he'll get over this. Plus, that'll leave us a chance to start off our relationship properly."

Macy smiled at him brightly.

"I love you, Macy," he said as he dipped his head closer until he rested his lips against hers.

"I love you too N—

"Macy! Where are you? I'm ready to go," Kevin called out after her from downstairs. Nick and Macy immediately broke apart from each other.

"Coming!" Macy called back and then gave Nick a quick peck on the lips and made her way to meet her boyfriend.

Even though Kevin was in college, he was still his usual Kevin-self. And while he may be the oldest Lucas brother, he was the most playful and childish while Nick, though the youngest, was the most mature. It was remarkable how he and Nick were total polar opposites. But being with Kevin made Macy feel at ease. Even though she may not love him as much as she loved Nick, he gave her a sense of comfort that only he could give her, especially during this time in her life when things at home were very tense. He was just so playful. He made her forget about the seriousness of life. He was a fresh of breath air.

Macy was busy laughing when Kevin decided to take some silly pictures with the monkeys and bears. He was truly a kid at heart. After the zoo, they went to Rita's for some ice cream. They watched the sunset in the park and after that Macy walked Kevin to the train station. It was there where Kevin wanted to have a meaningful talk.

"Look, Macy, I just want to let you know that even though I'm in college now, there's no other girl I could think of being with than you," Kevin said as he stared lovingly into her eyes.

Macy felt guilty because she knew she had nothing to worry about because Kevin was the most honest and devoted guy in the world. She on the other hand was far from being loyal…She remembered what Nick told her and she took a deep breath and said, "Kevin, there's something I need to tell you…"

"Wait. Can you hold on for a sec? Because I want to tell you something first," he said and then he took her hands into his and said. "Macy, you're the best thing that ever happened in my life. Before you, I didn't think I could ever find someone worth loving especially after my whole drama with Anya. I always had bad luck in love but you were the answer to my prayers. I know I sound so dramatic but it's true. I love you Macy."

He looked at her hopefully and Macy knew he was waiting for her to say the words back to him but Kevin, being the thoughtful boyfriend that he was, said, "You don't have to say it to me if you're not ready. I'll wait."

He kissed her lightly on the lips. Macy could feel a lump on her throat growing. She needed to break things with him but Kevin looked so happy and at ease with himself. How could she break his happiness? She couldn't be that cruel.

"And it sucks that I can't come home for your birthday so I told Nick to make sure he treats you well in my place. But don't worry I got you something," Kevin said as he took out a little box he kept in his pocket. "Open it."

Macy hesitantly opened the light blue box and there was a ring inside.

"It's a promise ring, Mace," Kevin said lovingly.

Meanwhile, Nick tried to distract himself but he kept staring at the clock. It was already 8 o' clock. Kevin should already be on his train back to NYU. He checked his phone a couple of times but he received no messages from Macy. Did she break up with him?

He was about to go to bed early but he was restless. He tried calling her but she wasn't picking up. And then he heard the door bell. His parents were out of town and Frankie was sleeping over a classmate's house so he got up from his bed and made his way downstairs. When he saw who it was, he quickly unlocked the door.

"MACY!"

"Hey," Macy said quietly.

"So how did he take it?" Nick questioned her.

"Um…well…you know Kevin…" Macy said uneasily.

Nick nodded his head solemnly, "So it was bad, huh?"

He noticed Macy looking intently at the ground. It must have been really difficult judging by how she was acting.

"Come here," Nick said as he gave her a hug. And they both stayed like that in each other's embrace. "Mace, why don't you spend the night? No one's here but me."

She nodded her head slowly and followed him inside. But before she entered his room she quickly took off the ring that was on her finger and hid it in her pocket. Nick didn't need to know the truth just yet.

Closing Remarks:

So here's my first one-shot. I haven't written an M-rated story in a while so I wanted to give it a shot. But it's not pure smut since there's an actual back story to it all which I think is pretty intense. This was interesting to write because I haven't written Macy in a dark light. She was always the good girlfriend or the good friend but in this story she finds no problem screwing Nick behind Kevin's back...I wonder if I continued this where this story will go. But as of now I plan to leave it as a one shot. But if a lot of you really want me to continue this, tell me and I might consider it.

REVIEW!

-Penelope36