'Allison, your sister is here!' Allison jumped, surprised. She hadn't seen her estranged twin for over four years while she had been in San Francisco with their rich cousins enjoying living the high life. Although she had been a little bit, okay a lot, jealous of her twin, Allison had also been relieved that she wasn't around; Annabel was not a particularly nice person. Scratch that, Annabel was a bitch. This described Allison's feelings now Annabel was back in town.

Allison ran to the door and opened it for her sister. Instead of saying thank you, Annabel dropped her giant Gucci suitcases and called out their father's name.

Chris, Allison and Annabel's father, broke into a wide smile and hugged Annabel. 'I'm so glad you're home.' Chris whispered into his daughter's hair.

Allison shook her head and took the suitcases into Annabel's room, opposite her own. Behind her, Annabel called out. 'There are five more of those in the car! Be a sweetie and grab them too.'

Allison reluctantly did as she was told, but not before texting her best friends what was happening. To both Isaac and Lydia, she texted my twin is back! I need 2 get out of here.

Isaac replied first with on my way. And he arrived right when Allison had gone back downstairs to collect the last suitcase from the car.

He rolled up in his new car, he had sold his old house and used the money to finance his new purchase; a sweet Audi A4.

He parked up beside Annabel's car and stepped out. He insisted on taking the suitcase from Allison and walking with her upstairs.

'If I knew you were going to be such a pain in the ass, I wouldn't have called you.' She huffed, irritated.

'First off, you didn't call, you texted. Secondly, I want to see what your secret twin looks like.' Isaac replied, his trademark smirk on his face.

Allison playfully swatted at him and they both grinned. Allison had made it no secret to Isaac that she wasn't looking for a relationship right then, but at the same time she would have loved to kiss those smirking lips at least once. Isaac, at the same time, had made it no secret to Allison that he liked her, and he was willing to wait. At least until another girl caught his attention. Neither of them had known it would have happened so quickly.

They were both still smiling when Allison opened the door where Chris and Annabel were looking at them both quizzically.

'Chris,' Isaac nodded at him with his smirk still on his face, 'Allison's sister,' this time his smile grew. Although Allison and Annabel were twins, it was obvious Annabel had put more effort into her appearance. They looked similar but at the same time, very different; Annabel had very dark blue hair, whereas Allison's was dark brown, Annabel's eyes were also blue, and Allison's were brown. Allison had put on just mascara today; she didn't think she'd be seeing anyone. Annabel instead had gone the whole way with lip-gloss, mascara, eyeliner and foundation, all expertly applied.

'Annabel,' she said and held her hand out.

'Isaac,' he said and shook the proffered hand.

Annabel winked at him, before suggesting she should show him where to put her bag. Even though he knew the layout of the Argent's house very well, Isaac accepted the offer with a flirtatious grin.

Allison watched them go up the stairs feeling jealous. She knew she had rejected Isaac's advances and really she had no right to be jealous but she was.

She sat down at the table and helped herself to some tea and Chris sat opposite.

'It's always the ones you think you don't want,' Chris said, smiling sadly. 'And you only realise later how completely foolish you were to turn them away.'

Allison mentally agreed. It was the same with Lydia; she had realised, almost as soon as Stiles and Cora had started dating, that she was in love with him also. Obviously by then it was too late and she'd just let them be together and gone right back to Aiden. Allison knew, however, that Stiles had liked her back; he just didn't want to hurt Cora.

She heard the low bass of Isaac's laugh and it was joined by that of her sister. This shot a spark through her that propelled her to walk upstairs to Annabel's room. She usually loved Isaac's laugh, because she caused it. Now she hated it with every fibre of her being as she stood outside her sister's closed door. She pushed it open and gasped.

Isaac was sprawled on her sister's bed, minus his shirt. Annabel was lying with her head in his lap and they were kissing.

Isaac just looked up lazily from where he was and grinned devilishly. 'Allison, do you mind passing my shirt back? I have to run.' Annabel made an indignant noise and grabbed his shoulders.

'Not so fast…' Thoroughly disgusted and very much jealous, Allison threw his grey V-neck at him and almost ran to her room.

Annabel kissed Isaac once more before he pushed her off him. 'I really have to go, I've got to get home before Scott's mum murders me.' It was 10 in the evening and the McCall's had imposed a new curfew. Annabel just frowned. Then she remembered frowns cause wrinkles and quickly un-frowned.

'Welcome to Beacon Hills.' Isaac said and jumped out of her 4th story building window.

Just wanted to say thanks for reading, this is my first FanFic and I hope it goes well! Please review, I'll post chapters whenever I can which will hopefully be everyday if I'm lucky.