So, this chapter is for you : TheEvilQueenie, HAPPY BIRTHDAY! I hope your day is full of joy, laughter, love and happiness my friend. I am so honoured that you ask for a chapter from me, it means the world that you love this story that much. I hope you'll like your chapter, it's a bit angsty but you know me... ;) Again, I wish you the best of all birthdays! xx

Thank you everyone for the love&support&reviews for this story, you guys are the best and I love you all !


Previously on One Mistake:

Their eyes locked.

"I have to leave this house." he whispered, "Please, let me go."

"Robin-"

"Please."

And she knew she had lost, she had went too far and he was too hurt to listen to her.

"I'll be here, waiting for you. All eternity if this is what it takes to get you back."

He opened the door and didn't even look at her when he left, saying

"Please Regina, don't say things that you don't mean."

And then he was gone.

And Regina crumbled on the floor, her legs finally giving up on her, sobs racking through her body.

This was a nightmare.

It had to be.

It couldn't…

No.

This couldn't be real.


Chapter 12:

Regina was in their bed, cuddled in one of Robin's sweatshirt and crying her heart out.

She had ruined the only good thing in her life.

She had ruined his love for her.

How could she had done that?

"How..." she whimpered to no one but herself.

She was sobbing, tears blurring her vision and breath erratic as her lungs were compressing in her chest due to her forcing them to breath. Then she took her phone, dialed the only number she knew by heart…

"You've reached Robin, leave me a message and I'll call you later!"

She cried harder in front of this voice she already missed so much,

"Robin..." her voice broke and she sniffled. "I am sorry. I am so, so so sorry. Please… Oh please my love answer me… Please. I know… I know I…" she couldn't do it. Her tears wouldn't even let her talk. "I love you." she breathed brokenly and then ended the conversation and buried her face in the pillow.


Robin's phone rang from where he had put it on the table in front of him, but when he saw the picture of the woman he loved more than anything else, he just stared with tears pricking at the back of his eyes.

Because she had been cheating on him.

Yes, she may not have actually sleep with Daniel, but it felt exactly the same to him.

And that hurt.

That hurt like hell.

What did that even mean for them?

Did she really love him as much as she claimed?

Or had he been a way to forget about the pain Daniel had inflicted her, and now he was back but she was too proud to go to him so she stayed with Robin while she really loved Daniel and-

"Please, stop." came a voice and he jumped, seeing Emma at the door looking sadly at him.

Robin wiped his cheeks (and when did those treacherous tears fall down?) and tried to clear his throat.

"I brought you covers." she said and he nodded gratefully,

"Thanks. And sorry for the hour and barging in without notice."

"Please Robin." she waved her hand as if it was nothing. "You're my friend. Of course I'm here when you need me. Plus, Neal likes you, you know that. And let's not talk about Henry… You're like his favorite uncle."

He smiled sadly.

"Thank you."

And then his phone beeped and he saw he had a new voice mail.

Tears again.

Oh God, his heart would stop from the pain wouldn't it?

"You should at least give her a chance to explain herself."

"Emma..."

"She really meant to tell you, you know."

Robin's heart froze.

"You knew?!"

A silence and Emma paled.

"I did."

Another silence and Robin really tried not to feel betrayed for the second time but…

"You didn't tell me." and it sounded like an accusation even to his own voice.

"I didn't." she admitted. "I am sorry Robin, but Regina wanted to be the one to tell you and I thought she deserved a right to save your relationship."

Another silence.

"You should have told me."

"I am sorry." Robin nodded and then she sighed, "I'll leave you to it, then. Try to sleep, Robin. You'll both talk it out in the morning."

"I doubt that very much." he whispered as she left the room.


Regina was still in bed, tears rolling down her cheeks.

And then her phone beeped.

She jumped on it and couldn't help but feel disappointed when she saw it was only Emma. But then her heart started beating faster.

ES: Hi Regina, I am really sorry for how things turned out. Robin is with us tonight, at the house and I think he will stay here for some time so please don't worry about that.

Her fingers were shaking as she answered.

RM: Thank you so much, Emma. How is he?

ES: You have to keep faith he'll find his way back to you at some point.

Regina laid her phone down and whimpered.

Hope.

Here with that word again…

But what hope was there when she had broken his trust?


The next day.

Regina was trying to eat something in their kitchen, but all she was really able to do was to think about Robin.

She picked her phone again and tried to call him…

"You've reached Robin, leave me a message and I'll call you later!"

She closed her eyes.

"Robin, this is me. Again." she took a deep shaky breath, "Look, I just want you to know that I love you more than anything in this world and I am so sorry about what happened. I made a mistake. I know that. But I will wait for you to forgive me, no matter how long it takes… I love you."

She closed the call and closed her eyes tightly, tears rolling down her cheeks.


Robin was listening to her voicemail, heart breaking in his chest.

He wanted to believe her.

He wanted to call her and tell her it was forgotten and they were good again.

But he couldn't.

He was too stubborn.

And she had hurt him…

She had hurt him and he didn't want this to be so easy for her.

So no matter how much it hurt him, no matter how much he wanted her…

He didn't call her back.


The next week.

Mary Margaret saw Regina came into her office and frowned, worried.

Her best friend was so miserable and she didn't know what to do to make it all better. She was pale and so very heartbroken…

"Are you alright?" she asked, coming in the office where Regina was staring at an imaginary point on the wall.

"It's been a week." she said, voice hoarse. "A week and Robin still won't talk to me." her voice broke, "A week since I was able to sleep and all I can think about is him, and us and how happy we were."

"Regina..."

"I'm not even sure we're still engaged." she sobbed and God, Mary's heart broke for her.

"Things will work out, I'm sure of it."

"I don't even know who I am without him, Mary."

"I know." she breathed, "but you have to keep faith Regina. Robin loves you. He does."

Regina tried to nod, but her lips were trembling and soon enough she was crying. And that had Mary so worried… Because Regina wasn't one to cry in front of anyone.

"I'm not so sure..." Regina finally broke.


Robin Locksley was miserable.

That much was sure for Emma.

He looked so pale and empty, and so not like the Robin she was used to see and work with.

"You wanna talk about it?" she tried and he shook his head, eyes lost on a faraway point.

"Not really."

"Robin..."

"It's fine, Swan."

She sighed again, he didn't smile, didn't react to her lame jokes.

He was here but his head (and heart) were clearly elsewhere.

She had a pretty good idea where.

"I can see it's hurting you."

He sighed again.

"Of course it is. I love her."

Emma shook her head,

"Then for God's sake Robin, talk to her!"

The man looked down, pensive.

"It's more complicated than that, Emma."

"I don't see why. Yes, she's made a mistake but she's clearly sorry for it and she clearly loves you."

Robin chuckles sadly.

"I don't blame you for not understanding." and his voice was so low, this wasn't like him at all. "But it is more complicated than you think." he took a deep breath. "Yes, you're right nothing actually happened between Regina and Daniel, but you have to know that I have always feared something like that would happen. I didn't even want to date her at first, because I was afraid to be a mean to forget about her true love..."

"Oh Robin."

"And now? Now that my worst fear came true?" he shook his head again. "And the worst is that I always was afraid she would choose Daniel over me; and now not only am I sure of it, but I know I would have chosen her over anything."

Emma stopped talking.

More complicated indeed.


The next month.

It had been a month.

And still nothing.

Regina was becoming mad.

She actually thought she was losing her damn mind.

She knew he had come home to take some stuff because there was his scent floating in their room, and she didn't know how she was still able to breath when missing him was breaking her heart entirely.

She tried to call him once more…

Nothing.

No.

Regina knew something for sure.

She couldn't continue like this.


Emma was talking to Robin, Henry and Neal had gone to sleep leaving the two friends to talk.

"Thank you for having me, Swan."

The blond smiled and waved,

"Forget about it."

"Maybe I should get my own place." he whispered and Emma sighed, running a hand through her hair and then looking very seriously at her friend,

"You need to talk to Regina, Robin."

"I don't want to." he admitted,

"I know. But I also know that you will lose the love of your entire life if you keep acting like a stubborn man."

A silence.

"I know you're right." Robin finally admitted, because he did. He really did. "But I can't help it. You have to understand… I've been burnt by love before, I can't risk it again."

"Robin..."

"No. It had hurt before but nothing could compare with the intensity of my feelings for Regina. I love her more than my own life. I can't… I can't let her a chance to hurt me."

Another silence.

"But you know that to love is to take risks, Robin." finally said Emma and he sighed deeply.

"Do you truly believe that love is worth taking so much risks?"

And he looked curious, tilting his head on the side and she smiled softly before answering,

"I do. I truly do. If you ask me if love is worth risking everything? It is, Robin. Of course it is." and then she added, "If you find someone you love enough to ruin your entire life for, it's always worth it."

Robin's blue eyes were wide as he took in her words.

But he didn't answer.

Because she was right.


Two months later.

Regina came into the police station because it had been two months and she couldn't take it anymore.

She needed him.

Even just to see him…

She came in and saw the moment Robin saw her because it seemed like his entire body froze.

Robin's heart stopped in his chest when his eyes fall on her.

She was so beautiful, she looked so heartbroken and he loved her so, so much.

"I will leave you two to it." smirked Emma when she saw who was there, and then she was out.

Robin got up and Regina almost ran to him, brown eyes wide and frantic full of unshed tears.

"Robin-"

She started but he couldn't listen to her.

It had been two months.

Two bloody months.

Two months missing her, and thinking about her, and loving her...

So Robin did the only thing he could think of and brought her to his arms. He heard her sigh of relief and how she clutched at him, the exact same way he was clutching at her. Feeling her heart beating against him was starting his own and it felt like his world was right again, to have her in his arms.

They finally receded and Regina took her chance to look at him, he seemed pale and so very miserable. Her own fault she realized…

"I am so sorry." she said and her hands were still on his chest, clutching. Robin couldn't answer, his hands finding their way to her waist, because now that he had touched her he couldn't stop. "I love you so, so much." her voice broke.

He had to say something and he knew it.

Anything.

"I know you're sorry." and his voice sounded hoarse even to his own ears. "Regina, you have broken my trust and that is not something to come back from easily. You know that."

"I do." she nodded, eyes full of tears and then she took a deep breath and cupped his cheeks, half expecting him to reject her but how could he? How could he when he loved her so bloody much?

How could he when she was finally back in his arms where she belonged?

"I need you to know that I am so in love with you, Robin..." she murmured and he let out a breath he didn't know he was holding, leaning in until their forehead met and she nuzzled her nose with his.

And Robin realized…

He actually knew that.

Seeing her today, it at least made him realize that.

His trust was gone, but he knew she loved him.

(He was just afraid she loved Daniel more.)

"I just need some time." he finally breathed and a sob escaped her because all hope was not lost.

He would come back to her.

Robin brought a hand up and wiped the tears on her cheek, smiling softly and she smiled back but then he frowned slightly and traced the lines of her face.

"You look so pale..." he whispered and she chuckled sadly.

"I miss you terribly."

Robin closed his eyes, leaning his forehead on hers once again and getting lost in the feel of her, the scent of her.

Getting lost in all that made Regina, Regina.

"I miss you too."

Another moment when all they did was enjoying each other, and then Regina added.

"I'll wait for you, take the time you need." she took a deep breath, "Just… promise me you'll find your way back to me in the end."

Robin receded slightly, and blue eyes locked onto brown. He took one of her hands from his face and kissed it reverently,

"I want to." he breathed against her skin, eyes never leaving hers and voice honest. "I desperately want to."

Regina's smile lit up the whole room as another tear escape her cheek.


Three months later.

Still nothing.

Regina was trying not to lose hope.

She really, really, really was trying to…

But even after their moment at the police station Robin wasn't answering her phone calls and she was slowly sinking…

She couldn't live without him.

How could she leave with half a heart?

What she did not see was Mary Margaret, watching her while frowning.

More and more worried for her best friend.


Robin was laid down on his bed in Emma's guest room. She had refused to let him go and he had been grateful, would rather not take an apartment because it would feel too… official.

And Robin didn't want that.

He didn't want to leave Regina.

He didn't want that at all.

Actually…

Actually he was slowly building up the courage to go back to her.

Slowly.

All he could think about was their moment at the police station, their hands on each other, her heart beating alongside his…

She was his.

She was his and he would get her back.

In time.


Four months later.

Regina was a ghost.

There was no other words for it.

She had lost the love of her life and couldn't deal with it.

She was as pale as a dead, she didn't sleep, didn't eat and didn't even realize what she was doing or saying anymore.

If she closed her eyes she saw Robin.

When her eyes were opened she saw Robin.

She wished someone could took her heart out of her chest and just squeeze it to give her some rest.

"Regina?" called her friend and she looked up, found Mary looking at her with worried eyes but she didn't need her worries, she needed Robin.

And she couldn't have him.

"I think I'll take my day." she whispered before gathering her things and leaving her office.


"You know it's been four month, Robin." sighed Emma because she felt Robin needed a push. "And I'm sure you know this can't go on forever."

Robin sighed and then smiled very slightly.

But she saw it.

Hope in the eyes of her friend.

"You are right."

"Did you make your decision, then?"

Their eyes met and he smiled again.

"I did, actually."

"Oh Robin..."

She knew where this was heading.

"I love Regina so very much and… if she still wants me, then I want nothing more than coming home to her, and start this new page together."

Emma squealed in happiness making Robin laughed and then she got up and hugged him from where he was sat at his desk.

"Swan..." he groaned but she heard the smile in his protest.

"I'm just so happy for you!"

He chuckled slightly.

"You're just happy I'll stop crowding your privacy with Neal." he teased and she teased back.

"Well that, too."

They both laughed but then he added softly,

"Regina needs to take me back, you know."

Emma waved her hand,

"As if it was going to be a problem."And then she added, "Actually, this is cause for celebration."

"How so?"

"Well, our shift is over and if you want to, you can come with me grab a drink before running to your beloved to make things right."

Robin thought about it, he couldn't wait to see Regina but at the same time he was nervous and a drink could help him settle his nerves…

"You know what? I'm in. I could use some liquid courage right now."

Emma laughed and patted his shoulder.

"Everything's gonna be alright, Robin."

And for the first time in months…

Robin really believed it would.


Regina couldn't spend a minute more in this house where everything reminded her of him and their love and all that she had messed up.

She needed to get out.

So she opened her dressing and took one of Robin's sweatshirt, new tears pricking at the back of her eyes when suddenly his smell was all around her and God, could she miss him more?

She needed air.

So she left the house, ready to wander in the city.


They were sat on a table in the Rabbit's Hole, when suddenly Emma's eyes widened.

"What is it?" asked Robin but the blond wasn't even listening to him.

"Lily!" she screamed and a brunette turned around before running to her.

"Emma!"

Emma hugged her, hugged the man beside her and then introduced them to her friend. "Robin, this is my cousin Lily and her husband."

"Nice to meet you." smile Robin and the brunette smiled back,

"So you're the famous Robin?"

"In flesh." he smirked and Emma chuckled,

"Yep, he is the pain in the arse I told you about."

Robin laughed.

God, it felt good to be laughing knowing soon enough he would have his beautiful Regina back in his arms.

Everything would be perfect.


She didn't know how long she had been walking.

Half an hour or so.

It didn't matter anymore.

Because no one was waiting for her to come home.

Robin certainly wasn't.

Her heart squeezed in her chest so tight she wondered how she was still breathing.

Then Regina arrived in front of the Rabbit's Hole and smiled sadly because even something as random as a bar was reminding her of him… They loved to go there and have a drink, chat and laugh while holding hands, or just sway to the music so close together… He would always look at her with that dark look after these dances and bring her home where they had night of endless passion.

God she missed him.

So Regina didn't actually know why, but she needed to take a look inside…


Lilly's husband and Emma went paying for their drinks ( something Robin had been against with every fibers of his being but Emma was stubborn, sometimes even more so than he was) leaving Lilly and Robin together.

"You've got that look." she smiled and he jumped, frowning slightly.

"What look?"

"That smitten look I see on my husband every time he thinks about me."

Robin chuckled.

"I do admit my heart is very much taken."

Lilly smiled.

"Tell me about her, I am a hopeless romantic and enjoy a good love story."

Robin laughed and ran a hand through his hair before starting to talk about his love, and as usual when he talked about her, his face was all he could see and even replaced Lilly's…

What he didn't see was a certain brunette looking at them by the window...


Regina's heart broke in her chest.

Her Robin.

With another woman.

On a date.

Her breath was erratic and she was clutching at the window as if she could stop what was happening.

Oh God.

Oh no.

Please.

Oh please.

He was smiling this smile of his that was supposed to be hers forever…

Supposed to.

He had proposed for God's sake! How could he be on a date so soon after…

He didn't love her.

She had broken his heart and that had made him fall out of love with her.

Regina let out a whimper as the truth hit her like a train full speed.

Robin had moved on.

He had moved on and she…

God,

She couldn't watch this.

So she ran away.


"So..." asked Emma once they were all outside the bar, and Robin took a deep breath, "Are you ready?"

He nodded, slightly nervous.

"I want her back with every fibers of my being." he said and she smiled,

"Then go get your woman, lover boy."

He smiled and turned around,

Ready to make it all better.


Once back home, Regina paced and paced and paced, heart beating so fast in her chest it might explode, her thought running and running and running, tears falling until she couldn't even see clear.

Robin moved on.

He had moved on and that hurt like hell.

He would tell her he was going to leave her, and sell the house and-

Oh God.

She covered her mouth when sobs tried to escape it.

She wasn't strong enough.

He would tell her he didn't want to marry her.

Did he want to marry that woman?

Not so soon but maybe one day… Maybe he'll look at her with those eyes she loved so much and this smile that made her heart stop a beat and then-

The door rang.

Wiping her eyes, Regina went to open it and her heart stopped.

"What are you doing here?" she asked, more like a whisper and then man in front of her frown slightly.

"Robin is a fool."

"Daniel… Leave, please."

She wasn't strong enough to handle him.

Not right now.

Not with what she had just discovered.

""Robin is a fool to leave you."

Her heart broke again.

Oh God hearing it made it all so real…

"Leave..." her voice broke but he shook his head and how the hell did he know about Robin leaving her?

"He is a fool." he said again and now she was crying, failing to catch her breath.

Because Robin.

Her Robin.

The images of him and that woman kissing were playing like a damn movie in her head.

Images of them making love in the bed he used to share with Regina, images of his oh so beautiful blue eyes darkened for another woman… of him biting his lip in ecstasy for someone else… Images of this dimple smile aimed at another woman, this look of utter love and devotion to someone that wasn't her...

She whimpered in pain at the thought.

"Oh no..." she whimpered, shaking her head and Regina had not noticed how close Daniel had got, but he cupped her cheeks and she was weak. Too weak to walk away.

"I love you." he breathed and she shook her head.

"Leave me alone."

"Robin left you, Regina."

"It was my fault."

And God, could her heart hurt her more?

"He doesn't love you anymore."

"Please, stop..."

"He loves someone else."

"Why are you doing this?"

"Because I love you and I am here and I can love you better."

She sobbed and sobbed and sobbed.

Was it how it felt like to lose the love of your life?

But then Daniel said something that stopped her heart.

"We can make him hurt the way he is hurting you, you know."


Robin was so very nervous but also sure about his choice.

It was Regina or no one.

He loved her like crazy and he was right about that leap of faith.

He was right to trust her.

And that was against his better judgment but Emma was right… True love wasn't easy, and it needed to be fought for because once you found it?

You can never replace it.

And that was what Regina was to him, his true love.

He glimpsed their house and smiled brightly, something lifting off his chest at the thought that soon, they would be together again.

His nervous heart was beating faster in expectation.


She tried to push him away from her weakly, but then he was whispering in her ear.

"Robin moved on, Regina."

"No…"

"He fall in love with someone else."

Her heart broke and now she was clutching at him or she would fall down, the pain hitting her full speed.

"Stop."

"I've seen them multiple times together..."

"You're lying."

"Kissing and hugging…"

"Please stop..." she sobbed because it was too much.

But it was weak.

It was so weak because she had seen them too.

Her Robin.

Her Robin with someone else and how could he do that only a few months after their fight while they weren't even broken up officially?

All she had been able to feel was mad with grief.

How could he move on?

How?

Daniel used her weakness once again and cupped her cheeks again, forcing her to look at him.

And she was tired.

So tired and sad, and heartbroken, and desperate…

"I love you so much." he said, "And I will never let you be alone." she shook her head weakly but he added, "And you can hurt Robin the way he has hurt you, you know."

She shook her head but barely moved it.

She was just so tired.

And Robin…

Her Robin…

Her Robin had moved on.

He had forgotten all about her and-

How was she supposed to live with that?

And then, she barely had time to realize what Daniel was meaning to do when he leant in…

And kissed her.

She froze.

But didn't push him away, her hands still hanging by her sides.


Robin frowned, seeing the door unlocked and came in, sensing something was not right.

"Regina?" he called, coming inside the living room.

And then he saw it.

Them.

Two people kissing.

His heart stopped.

His world crashed down.

A scream.

His.


A/N: *waving a white flag* ... please don't hate me?