'This year's prize is about something very small that makes all the difference. The Royal Swedish Academy of Sciences has decided to award the 2014 Nobel Prize in Physics to Dr Sheldon Lee Cooper from Caltech University, USA for his ability to prove the existence of String Theory and change the way we look at Physics today.' The commentator said as his speech was broadcast around the world. Penny felt extremely proud as she sat beside Sheldon wearing a white Versace dress that clung to her every curve. She clapped extremely hard when he smiled and stood up, walking towards the stage. Sheldon looked so happy, it was like he was walking on air and to him it felt like cloud 9.

Sheldon shook the commentators hand and accepted his medal and diploma. He looked at the audience and cameras with a massive grin on his face as he prepared for his acceptance speech.

'Your majesties, your highness's, ladies and gentleman, esteemed colleagues and friends… May I start out by saying what an honour it is for you to have me,' Sheldon smiled as the audience laughed, 'I'd like to take this opportunity now to thank the Royal Swedish Academy for finding my work worthy of this highest honour. I have heard that it is customary for the recipient of the award to offer a personal and scholarly comment on the nature and direction of Physics, however at this particular time, I think it's more important that I concentrate on making sure that I don't continue to stand here and sound like a squeaky and apologetic mouse but to roar like a lion out of pride in my profession.

'Today is a great day for particle physics. After years of dedicated work, String Theory has finally been proven. A lot of praise has been given to my work these past few months so let me refrain from giving it more praise and focus on something else. Let me focus on praising the people who have been supporting my research and I these past twenty years. My school, my college, my friends, colleagues…my mom, thank you all so much. This is my life's achievement and I want to thank you from the bottom of my heart. It is an honour to be here, it's an honour to accept this award and I truly hope that my discovery of String Theory will be used to prove many things that we scientists still have yet to discover about physics. And lastly, to close my speech… I want to thank my wonderful other half Penny for inspiring me to chase my dream.' Sheldon said before stepping down to a huge round of applause. Upon arrival back to his seat, Penny gave him a massive kiss which, unknowingly to them, was caught on camera.

'I love you,' she whispered to him and he nodded.

'I know,' he grinned before embracing her. The rest of the night was a blur for Sheldon, he had never been more excited in his life and he was just so happy that he was here with Penny and that she was part of fulfilling his lifelong dream.

Upon arrival back to their hotel room, Sheldon decided he was going to do it. He was going to go to get down on one knee and propose. Tonight. Then tomorrow, he would take her out to buy a ring. He and Penny had been working extremely hard on their relationship since their last spat and although they still argued, the stuck with it, as they had promised to one another. Penny had made real changes for him, just as she had said she would and they found that their relationship was now far more harmonious.

After reading all the congratulatory texts, he left his phone on the side board. 'Sheldon, can you help me get out of this dress sweetie?' Penny asked turning around so he could unzip her. As soon as the zip was down, Penny felt like she had been granted the gift of being able to breathe.

'I'm just going to take a shower, I bought some adhesive ducks at the airport because you never know with hotels whether or not they supply them,' Sheldon said and Penny chuckled. He was such a whack-a-doodle sometimes. When the door shut, his phone flashed and Penny looked at it to see that it was from Lani. She knew she shouldn't but she did it anyway. Opening up the message, she read it.

"Good luck on winning your Nobel Prize today hun, I'm so proud. I miss you not being here with me at the moment, its weird being in the apartment alone. Call me when you can xxxxx."

Penny's eyes almost bulged out their sockets and she felt her stomach knot, so she scrolled through all of his messages with Lani and was shocked to see that there were kisses involved on the end of every text. Sheldon hardly ever bothered with kisses when texting her, he had always just phoned her or knocked on her door. Speaking of which, the door to the bathroom opened and Penny quickly chucked the phone back on the side. Sheldon towel dried his hair and looked at Penny, who was suddenly starting to feel very insecure. She had to know more. She didn't think Sheldon was one to be unfaithful but she had to know if there was something going on, otherwise it would go round and round in her mind until she went crazy.

'So… you're close to your roommate… Lani?'

'What's do you mean?'

'Ok, I'm just gonna come straight out with it. Is there was something between you and her?'

'Penny, I don't understand what you're on about.' Sheldon said, confused and suddenly his phone buzzed again and he looked at it before looking back at her. She had a guilty look on her face and he frowned, 'Were you going through my phone?'

'I didn't go through your phone,' Penny scoffed, 'I walked over there and your messages were out. It's not that hard…'

'My messages were out?'

'Yeah, I could see them. It's not that hard to be bloody Einstein. Sheldon, just please tell me what's happening with you and her!'

'There is nothing happening!'

'Why don't you just tell me?'

'I just did! There is NOTHING happening between Lani and myself!'

'Oh come off it Sheldon, you're obviously involved in something with her, at least she seems to think so.'

'I am not involved with her.'

'You're not involved with her?'

'Absolutely not!' Sheldon cried.

'And there's nothing between you and her?' Penny asked, breathing a sigh of relief and Sheldon gave her a look before responding in a firm voice.

'Absolutely not.'

She was about to apologise for her behaviour when suddenly his phone flashed again with another text from Lani. Grabbing his phone, Penny opened up the message.

"TV went. Will call in an electrician to fix it but I saw you accept your award before it went off. You were looking gorgeous Shelly! I wish I was with you right now, it would have been amazing to be there supporting you! We'll celebrate when you come home ;) xxxxx"

Penny looked at him before looking at him in disgust, 'That's a fucking lie! What else have you been hiding from me?' she asked, starting to look for evidence on his phone

'Penny, please don't go through my phone, it'll just make you paranoid!'

'Paranoid? So you are hiding something!' she hissed, chucking his phone at him, 'Why didn't you tell me you fancied her!'

'I don't Penny!'

'You must do, don't lie to me! I read the text messages you send to each other! It's plain as day she fancies the pants off of you too!'

'She is my roommate! I don't find her attractive! I only have eyes for you and you shouldn't be reading my text messages Penny!' he yelled, before softening his voice, 'You should trust me. I love you and only you.'

Penny blinked and looked at the sincerity in his eyes. 'I'm sorry,' she sniffed and he sighed before it suddenly clicked with him what this was truly about. Why hadn't he seen it before?

'Look Penny,' Sheldon said, making sure he was calm, 'I know you're insecure about this because of what happened with Leonard but I am not like him. I love you and I wouldn't want to change you for anyone else but you have to trust me else we can't be in a stable relationship. I'll admit that Lani is aesthetically pleasing to the eye but she has nothing on you. And I won't let you ruin this day of bliss for me Penny. Now, I'm willing to forget the last 5 minutes if you are.'

Penny sighed and began to cry into her hands. 'What did I do to deserve you Sheldon, I don't know why you're with me… I just screw everything up. I'm so sorry Sheldon, truly I am. I know you don't see it but Lani… she's beautiful and she is coming on to you really strong and I don't know if it's because you don't get it or you can't see it but that's what she's doing. I can see it and it hurts.'

'Penny… have you so little faith in me?'

'I have every faith in you.'

'Then let me prove to you that I am yours and only yours.'

'How would you do that?

'Marry me.' He whispered, pulling her into an embrace. Penny's jaw dropped.

'What?'

'Marry me.'

'Even after what I just accused you of?'

'Marry me.'

A smile crept onto her face and she looked at her boyfriend, 'I shan't say a word unless you get down on one knee and ask me like a gentleman.' She grinned and Sheldon rolled his eyes before getting down on one knee.

'Penny Miller, do you think you could consent to becoming a Nobel Prize winner's wife? Will you marry me and make me the happiest genius alive?'

Penny nodded, 'Yes, yes I will.'

Sheldon grinned and crushed his lips against hers. 'I love you Penny.'

'I love you too.' She whispered against his lips, 'I want you to get rid of that Lani girl. Make her move out.'

Sheldon frowned and looked at her, 'Why?'

'Because,' Penny smiled at him, 'I've decided that it's about time I came home.'

Thanks for reading guys! I hope you enjoyed it! Let me know what you think! xxx