A/N: So I got the idea for this from reading other stories but at the same time not if that makes sense.

Disclaimer: I don't own any of the characters from Teen Wolf they belong to their creator. I own Sara Stilinski and anything/anyone else you don't recognise.

Back Together

Chapter 01: She's Home

Sara Stilinski, older sister to the hyperactive Stiles Stilinski. Oldest child of Noah and Claudia, she took on a mothering role after Claudia died. She was adopted at the age of four, eight years old when Stiles was born and eighteen when their mother died ten years later.

"Stiles! Get ready for school. Dad's gone to work already and I'm taking Roscoe," Sara called from the kitchen where she was making both coffee and waffles while trying to get her four year old son to still. "Mikey sit still, breakfast is nearly ready," Sara's ex had left her not long after she'd found out she was pregnant.

"But Unca Stiles isn't here," Mikey pouted looking at his mother from where he was sitting at the kitchen table.

"Stiles hurry up so Mikey eats," Sara called again, as she plated some waffles for both Stiles and Mikey before putting them on the table.

"I'm coming!" Stiles called back haphazardly pulling on his jeans a marvel shirt and a flannel before grabbing his school bag. Stiles all but tumbled down the stairs before he was in the kitchen. "Hey buddy!" Stiles grinned reaching over and messing up his nephew's hair.

"Stiles, why was there a werewolf in your room?" Sara smirked, walking back over to the counter and grabbing the mug of coffee she'd made. Stiles nearly choked as he took a bite of the waffles and realised what she had said.

"What? There was no werewolf in my room..." Stiles stuttered before shovelling more waffle into his mouth. "And why do you need my car?"

"Mines in the shop," Sara said as she drank some of the coffee and watched as Mikey started to mimic Stiles' every action.

'Just like I thought he denied you being there,' Sara sent the text to Derek and laughed, she knew Derek and his family were werewolves. She knew more about the supernatural world than she let on.

'He hasn't figured you out yet has he?' Derek sent a text back as he sat in the camaro around the block from the Stilinski's residence. 'You going to tell him?'

Stiles sat at the kitchen table eating his breakfast while observing his nephew who he noted was very much like him. How did his sister put up with him? And how did she knew about werewolves and Derek was the better question.

"Mikey, go up stairs and brush your teeth, mommy wants to talk to Uncle Stiles okay?" Sara questioned, helping the four year old off the chair and ushering him up the stairs. Mikey had a turtle stepping stool in the bathroom so he didn't need any help. "So Stiles, anything you'd like to tell your dear old sister?"

"What...I mean no...wait what do you know about werewolves?" Stiles raised an eyebrow reaching for the glass of orange juice in front of him.

"I know that they exist...and well..." Sara trailed off, tilting her head towards the front door as she heard footsteps thundering up the path. "You'll find out,"

"What?" Stiles downed the orange juice as Scott opened the door ready to pounce. "Dude what are you doing?"

"There's a new werewolf here..." Scott muttered under his breath as he noticed Sara standing in the kitchen. "Hey Sare when'd you get back?" Scott questioned before noticing that Sara was smirking at him. "You?" Sara nodded and her eyes flashed red quickly so that Scott could see but Stiles didn't.

"Mommy! Where's my Captain America shirt?" Mikey's voice travelled down the stairs from the bathroom.

"Have a look in the dresser where Grandpa put your clothes," Sara called back before her attention was Stiles and Scott who were both staring at her. "Yes boys?"

"How long...?" Scott's voice was barely above a whisper figuring that the older Stilinski could hear what he was asking her.

"Talia Hale gave me the bite before mom died, I was probably fifteen. Laura got me through the first full moon," Sara answered having more coffee as Mikey raced down the stairs jumping off the bottom step and then racing over to her. She may have told a little lie, but they didn't need to know the full truth just yet about her father.

"Ready mommy," Mikey tugged on Sara's hand as she put the coffee cup down before scooping him up in her arms.

"Good boy, do you remember Scott?" Sara questioned kissing him on the top of the head as she snuggled him. Mikey nodded and waved at Scott who was still staring at her open mouthed.

The reason that Sara had taken Stiles' Jeep that day was to look at houses, her and Mikey couldn't live with her dad and Stiles forever. She found one that day that was big enough for her to reopen her home daycare centre.

Saturday three weeks later, Scott had invited Sara to attend a pack meeting – what he was expecting was that Sara and Derek would be sitting next to each other quietly talking. Stiles spent the entire meeting glaring at his sister and Derek, he wanted to be the Stilinski next to Derek. Scott had spent the better part of three weeks trying to work out how Stiles' sister was an Alpha.

"How? How are you an alpha...also how did Stiles not know?" Jackson questioned, looking between Stiles and Sara before his eyes settle on Scott. "We're all thinking it,"

"How am I an alpha...killed one to stop them from killing my son. Mothers instinct, he was an ass and deserved it...and Stiles didn't even know I was one till a month a go," Sara answered with a shrug, Derek looked at Sara he remembered when she'd killed the alpha. "Then again Stiles didn't know I've been a werewolf since I was fifteen," Derek glanced at Sara a glint in his eyes, he knew that she was lying to them, she was just like him a born wolf.

"How old are you now?" Allison asked, from where she was sitting with Scott and Lydia.

"Twenty four, and my little boy is four," Sara replied smiling at Allison, Allison was curious about the little boy. "He's human, so was his father,"