This is the last chapter - thank you so much for all the lovely reviews, follows and favourites!

Tato Potato and beckyboogle, I hope this was a good birthday present.

Tanith Panic, there's not very much more chaos, I'm afraid - but I hope you enjoy what's here! Thank you for your review.

beckyboogle, thank you for your review - I'm really glad you're finding it exciting! I hope you enjoy the final chapter.

CBloom2, thank you for your review - you'll find out very soon if you're prediction is right! I'm glad you've enjoyed it.

X-Sammii-X, I'm glad you like the ending - I thought of that very late on so it nearly didn't go into the story! Thank you for your review.

ETWentHome, Sarah's confrontation with Ethan didn't go as planned at all! Let's hope Cal can help. Thank you for your review.

Emma stared at Cal in horror. "Oh, no. I did cheat on Ethan, didn't I? What are we going to do?"

Cal looked uncertain. "Did you enjoy it?"

"Oh, no, not at all," said Emma.

Cal looked a little bit hurt. "That's good. I suppose I didn't enjoy it either."

"Oh," said Emma, disappointed despite herself.

"I didn't hate it or anything," said Cal quickly. "It was good. It's just I have a bit of a thing for girls who kiss back."

Emma tried to console herself with the thought that at least Ethan liked her kisses. "Do you think we should we tell Ethan?"

"I think we should definitely tell him about Sarah so he knows you didn't cheat on him yesterday," said Cal. "The fact you technically cheated on him today is something we should probably keep to ourselves."

Emma thought, then nodded. "Yes. I think you're right. It would only confuse matters, wouldn't it?"

"Completely!" said Cal. "And matters are confused enough already. Come on: I'll take you to the staff room and then I'll go and find Ethan."

They went inside the hospital. Despite everything, Emma was curious to see a bit more of the place where Ethan worked. She had to admit the scream coming from one of the cubicles was a bit worrying and she wasn't overly keen on the guy who nearly vomited on her shoe, but it definitely didn't seem dull. She imagined Ethan rushing around, sorting everything out in his scrubs and stethoscope.

He must look very handsome when he was being efficient.

"I'm sure I do as well," said Cal.

Emma gasped. "Please don't tell me I just said that out loud."

"Okay. I won't tell you," said Cal agreeably. "But I suppose I can't really know what I look like when I'm being efficient. I usually leave being efficient to Ethan. Or Sarah." He smiled at the thought of his girlfriend. "She's amazing, isn't she?"

"She's the best sister in the world," said Emma, and walked into the staff room to discover her sister kissing her boyfriend.

After the first moment of shock, Sarah released herself from Ethan's hold and backed away from him. She trod on something and decided it must be a cushion.

"Ouch, that's my foot!" said a familiar voice from behind her.

Sarah turned to see Cal, his face screwed up with pain as he massaged his toes. "Sorry, Cal. By the way, this wasn't what it looked like." She glared at Ethan. "I stand corrected. You are a complete rat after all."

"Cal's always been a rat," said Ethan. "But it doesn't matter because you're with me, not him."

"Yes. We might need to have a little discussion about that," said Sarah.

Cal turned to Ethan and smiled. "Well, I never thought I'd see you kissing my girlfriend."

"She's not your girlfriend," said Ethan. He touched Cal's arm in a comforting manner. "I'm sorry, Cal, but she says kissing you with a mistake and it can never happen again. It's me she wants to be with. I'm sorry."

Cal turned to Sarah in alarm.

"Relax, Cal," said Sarah. "Ethan's just getting confused. Ethan, I meant that making you cry was a mistake and that's what I don't want to do again. I didn't mean I wanted to kiss you."

Ethan started to cry again.

"Oh dear. I don't think I'm very good at not making Ethan cry," said Sarah.

"But I love you," sobbed Ethan.

There was another sob from near the door. Emma was standing there. Sarah started towards her, but Cal got there first.

He put his arm around Emma. "Don't worry. He doesn't really love Sarah. You're the one he loves."

Emma stopped looking on the verge of tears and looked on the verge of dying of shock. Cal helped her to a chair.

"No, Ethan, you don't love me," said Sarah patiently. "You love my twin sister, Emma." She turned Ethan towards Emma.

"Twin sister?" said Ethan. "You really think I'm going to fall for that?"

Confused, Sarah gestured towards Emma.

Cal sighed and started looking around the room. "Where's his glasses?"

"I think he put them in his pocket," said Sarah. She spoke as she might to a small child. "Put your glasses on, Ethan."

Ethan ignored her in favour of crying.

"Never mind," said Cal. He held out his hand to Emma. "Come on. Time to prove to Ethan that I've got this all figured out and he's being an idiot. Forgive me if I enjoy it. It's usually the other way round."

Emma walked towards Ethan. "Ethan, please don't cry. It's me. It's Emma. It wasn't me you saw kissing Cal yesterday. It was my twin sister, Sarah."

Ethan started and lifted his head. His eyes locked with hers. Then he turned to look at Sarah. "I suppose you think that's funny," he said.

"Funny?" said Emma, amazed. "Why would it be funny that you're hurting?"

"You've obviously been playing a joke on me all along!" said Ethan, distraught. "Have you been taking it in turns to go out with me?"

"Of course not!" said Sarah. "I've never been out with you because I've been too busy going out with Cal."

Finally, the penny seemed to drop. Or at least show signs of being dropped. "So... you're Cal's girlfriend Sarah?"

"That's right," said Sarah. "And we've actually met before. You did my blood test and I threw up."

"And Cal did my blood test and I cried," said Emma.

Ethan looked a bit worried. "Which one of you did I ask out?"

"Neither of us," said Emma.

"Oh God: don't tell me you're triplets!" said Ethan.

Emma shook her head. "No, but you still didn't ask me out because I did the asking out."

"Oh, right. Yes," said Ethan. "I remember now."

"Then I asked you out," said Cal to Sarah. "And got what I wanted. Everything I wanted."

They stared at each other in a soppy fashion which Sarah knew she shouldn't indulge in too often.

Ethan still seemed very confused. "But didn't you notice us calling you by the wrong names?"

"You called me 'Miss Mealing'," said Emma. "So you probably called Sarah 'Miss Mealing' too."

"I think Cal might have called me 'baby'," said Sarah, and smiled at him. "Very unprofessional."

Cal smiled back. "Extremely. I should be struck off immediately."

"Oh, definitely," said Sarah. "But it is a bit weird. How could you not know your girlfriends were sisters?"

"Did you know your boyfriends were brothers?" said Cal.

Sarah was shocked, but tried to hide it. "Considering you insisted your brother's name was Nibbles, no."

Emma turned to Ethan in confusion. "I thought your brother was called Caleb, Ethan."

"Cal is short for Caleb," explained Cal.

"Yes. I suppose it could be," said Emma, after a moment.

Ethan smiled round at everyone, his tears apparently forgotten. "So no-one's cheated on anyone - and this must be a happy ending!"

They all smiled at one another. Sarah moved closer to Cal, who put his arm around her. Ethan held both arms out to Emma and they shared a hug.

"How about we all go out for a drink?" said Cal. "That's usually what people do after a farce, isn't it?"

But Ethan shook his head. "We can't go yet. I've just thought of something. We need to repeat your bloods, both of you. There's a chance we gave the results to the wrong girl."

"You could be right," said Cal. "It might be that Sarah is the one who's slow to stop bleeding and Emma's the one who's susceptible to colds."

Emma sneezed right on cue.

"Nicely timed," said Ethan. "But I'm not sure the pub's a good idea, sweetheart. Why don't you both come back to our flat and I'll cook?"

Sarah looked at him with interest. "A man who cooks. Lucky you, Emma. Maybe I shouldn't have been quite so quick to push Ethan away."

"I can cook too," said Cal quickly.

"I'm glad to hear it," said Sarah.

"Did you mean it about loving me?" said Emma as she and Ethan said goodbye.

"Of course I meant it," said Ethan.

Emma linked her hands behind his neck. "Do you think you could possibly say it again?"

"I love you," said Ethan. it sounded even better when he wasn't crying.

"I love you too," said Emma.

"So, you can cook," said Sarah approvingly.

"Some might say I'm a bit of an expert at turning the heat up," said Cal.

"Oh, I wouldn't have said that," said Sarah.

"No?" said Cal, disappointed.

"No. I think you need a lot more practice," said Sarah. "Starting now."