It was 1 o clock in the afternoon and Penny was already on her third large glass of wine, in addition to the 3 jägerbombs, 4 vodka shots and two beers she had had prior. She knew drowning her sorrows in alcohol wasn't the answer but it was the weekend and she wasn't working tomorrow and it sure as hell made her feel better. Downing the glass, she began to refill it when suddenly the door knocked. Sighing, she put the bottle down, stumbled over to the door and opened it.

'Hello Bestie,' Amy said, 'May I come in?'

'Sure, could use some company to be honest. Fancy a drink?' Penny stood aside and let Amy walk in.

'Sheldon told me everything on the phone this morning when discussing driving arrangements so I thought I'd pop round and see how you're doing. But judging from your alcohol intake and the way you're dressed I would say not so good,' Amy said looking at Penny up and down, taking in her messy hair, oversized t shirt and leggings, 'but despite your homeless look, you still exude raw sexuality to me.'

Penny smiled; Amy's compliments always managed to cheer her up because they were so odd. 'Thanks Amy,' she said, 'you're right though, I'm not doing so well.'

'Understandable. I understand that it is the social norm for us to bitch about Leonard to make you feel better whilst eating excessive amounts of...' Amy opened her bag and pulled out 12 large bars of Hershey's chocolate, 'chocolate! Tadaaa!'

'Amy, you know I love you but…'

'Love you too bestie,' Amy interrupted and gave her a Cheshire cat grin.

'But, I just really want to get really, really, really… really drunk. Its either chocolate or alcohol and today I pick alcohol.'

'I think you're almost there you gorgeous vixen so let us continue,' Amy walked over to the kitchen and poured her and Penny two new large glasses of red wine. 'You're drinking white wine, studies show that red gets you drunk faster so….,' Amy thrust the glass in Penny's hand and raised her glass, 'To getting really, really drunk.'

'To getting really, really drunk,' Penny chuckled and both she and Amy took a sip after they chinked glasses, 'Thank you Amy, I really appreciate you coming to cheer me up.'

'My fingers are tingling and my brain feels funny. I think it's affected me already… the only explanation is that I am wasted.'

'Amy, you had one sip of wine, you can't be drunk!' Penny giggled, taking another gulp of wine before shrugging and downing the rest of the glass.

'I must be an extreme lightweight then.' Amy chuckled.

'Oh sweetie, if you feel drunk after one sip of wine, extreme doesn't even cover it.' Penny hugged her friend and kissed her cheek.

Knock knock knock

'Penny'

Knock knock knock

'Penny'

Knock knock knock

'Penny'

Penny chuckled to herself; there was something kind of cute about Sheldon's OCD knocking thrice on her door. Opening the door, she smiled at him.

'What's cookin good lookin,' she giggled hysterically to a bewildered Sheldon.

'It appears you've taken in excessive amounts of alcohol Penny,' he said, walking into her apartment

'I'm wasted too!' Amy piped in.

'Really, I expect it from Penny but not from you Amy,' Sheldon sighed in disappointment.

'Heeeeeyyy, that's not very nice you big… mean… man,' Penny slurred.

'You are drunk Penny, I think that perhaps you should go to bed before your liver and kidneys fail.'

'No, I think I should go to the bathroom,' Penny ran to the bathroom and soon the sounds of Penny throwing up could be heard. Sheldon found himself to be a little worried. His Penny was taking this really badly, whilst Leonard was just feeling sorry for himself and playing Halo III on the Xbox, 'How much has she had to drink?'

'I'm guessing a lot, she was really drunk when I arrived. It appears though that my drunkenness doesn't seem to have lasted very long,' Amy sighed, 'darn it, maybe I should knock back a few spirits?'

'Amy, might I suggest that you don't do that. Wolowitz and Koothrapali will be over soon so I wanted to catch you before we start Dungeons and Dragons.' Sheldon stated, sitting down next to Amy.

'Ok, what's up?'

'I want to sleep with you tonight,' Sheldon said and Amy's eyes almost popped out of their sockets.

'What?!'

'Perhaps I phrased that incorrectly. I wish to conduct an experiment that requires both you and me to sleep at your apartment tonight. As I explained to you this morning, I fell asleep next to Penny whilst trying to make her feel better yesterday and I found it oddly enjoyable. So from my findings I thought if it's enjoyable with someone like Penny, it must be enjoyable with my girlfriend. Therefore an experiment is needed to be done in order to validate my hypothesis. No coitus will be involved of course; I just wish to alter the paradigm of our relationship slightly in order to accommodate this experiment.'

Amy furrowed her brow before shuffling in her seat to face him more squarely. 'Proposal: You may conduct this experiment at my apartment on the proviso that I get some intimacy from you. Instead of coitus I propose we have a hot make out session in bed… with tongues. A night filled with romance that goes to third base and sets fire to my loins.'

Sheldon blinked at his girlfriend and cleared his throat, 'Er… counter proposal, I will sleep next to you aaaaand pat your back should you choke on your spit in your sleep.'

'How about this, full body massage with a no clothes rule,' Amy suggested and Sheldon sighed.

'Dear Lord Amy, you need to learn to keep your libido in check, I know I am a total chick magnet but really...'

'Fine, we sleep in the same bed and you cuddle me? Final offer.'

Sheldon paused to think about the offer before nodding and standing up, 'Very well.'

'Perhaps a kiss as well?'

'Don't push your luck Amy,' Sheldon scoffed, 'just be ready to leave at 9.30pm and make sure Penny is ok until then. I must go set up for our game of Dungeons and Dragons, no way will I lose to Wolowitz again.'

Amy smiled to herself as she watched her boyfriend leave Penny's apartment. As soon as the door shut, Penny entered the room. 'Ugh, I feel so awful,' she groaned. Amy looked around but couldn't see Penny anywhere, 'down here Amy,' Penny's voice came and Amy's eyebrows rose as she saw her friend crawling back into the room on all fours.

'Perhaps drowning your sorrows in alcohol was not the best idea my beautiful blonde bombshell.'

'I'm starting to think you're right, what did Sheldon want?'

'He told me that he's going to sleep with me tonight,' Amy said, still reeling in shock. Penny gawked at her friend.

'As in he's going to have sex with you! Oh my God, Sheldon really is a red blooded male, I can't believe it!' Penny cried, a slur still present in her voice.

'No, no intercourse. He said he enjoyed sleeping beside you last night and wanted to attempt it with me. For scientific reasons only though: in order to draft a direct comparison between your beautiful self and me.' Amy shrugged.

'Well, it's still a big step for Sheldon; with me he woke up to me sleeping next to him so it was involuntary, but with you he is choosing to share a bed with you.'

'You make an excellent point Penny,' Amy replied, 'but er…why don't you get up?'

'I figured since I'm seeing three of you at the moment that getting up wouldn't be a good idea. Plus the world is still spinning,' Penny blinked repeatedly to try and steady herself.

'Would you like me to help you into bed bestie?'

'That would be… wonderful.'

'Take that Wolowitz, I win!' Sheldon cried, jumping up from his spot in delight after winning dungeons and dragons, 'Now, if you'll excuse me, I have to pack.'

'Pack? Where are you going?' Leonard asked.

'I'm conducting an experiment that requires me to stay the night; I will be back tomorrow morning.' Sheldon smiled before stalking off to his room.

'So did you know Priya is back?' Raj said, swigging back liquor from the bottle he had in his hand.

'Really?' Howard asked and Raj nodded.

'Yes, she was supposed to come on Sunday but she arrived yesterday evening. I wonder how Penny will feel about her coming back for good, what do you think Leonard?' Raj asked.

'Oh I don't know,' Leonard started to feel very uncomfortable.

'Well they bonded over your flaws last time so I'm sure they'll be fine this time round.' Wolowitz laughed.

'Who will be fine?' Sheldon asked.

'No one Sheldon, just drop it.' Leonard growled through his teeth. Although it wasn't picked up by Sheldon, both Howard and Raj noticed it.

'Woah, what's with the hostility dude?' Raj asked and Leonard buried his head in his hands.

'You mean you don't know yet? I would have thought that Amy or Penny would have told Bernadette, who in turn would have told Wolowitz, who in turn would have told you,' Sheldon said and Leonard shook his head, still keeping his head at the floor and praying Sheldon wouldn't say anything. However there was no chance Sheldon would keep quiet now, Leonard knew that.

'What happened?'

'Unfortunately Leonard engaged in intercourse with Priya and Penny walked in on them. Subsequently, the two of them have terminated their relationship and whilst Leonard plays games, Penny drowns her sorrows in alcohol.' Sheldon said and both Howard and Raj's jaw dropped.

'You cheated on Penny?' Howard cried at the same time Raj exclaimed:

'You defiled my sister… again!'

'Yes, and I feel horrible about it! Penny ended it with me and wait… did you say Penny was drinking heavily?' Leonard asked.

'Yes, she's drinking a lot but she's got Amy to look after her for now. If you really want to win her back Leonard, you are going to have to wait until she is ready for you. It only happened yesterday Leonard, and if you approach Penny again to try and rectify the situation the you're practically asking her to transform herself into the death star and shoot you. Anyway gentleman, I bid you goodnight and will see you tomorrow.' Sheldon gave a wave to the group and left the apartment.

'Dude, I didn't think you had it in you to cheat.' Howard said, still in shock.

'Neither did I, but it happened and there's nothing I can do about it.' Leonard sighed as his phone began to chime, 'oh god it' Priya… what should I do? Should I answer it?'

'You gotta make a choice dude, Penny or Priya.'

Ohhhhh Priya or penny? Thank you my lovely reviewers so far, you've really motivated me to write, the more motivation I get the faster I can update. I did have a writers block before I uploaded this chapter! Let me know what you think and enjoy the rest of your day! xx