Disclaimer: I don't own Teen Wolf.
Summary: Stiles has got a sister he hasn't told anyone about and for good reason.
Stiles opened the door to his house and Scott followed him inside. Stiles' eyes swept up and down the hallway and then he moved off again as soon as he saw that the coast was clear. Stiles nodded his head and started up the stairs to his bedroom.
"Stiles I've got to talk to you." Stiles' Dad said from the side of the stairs. Scott knew it pained Stiles to lie to his Dad but it was necessary to protect him. Plus they had to talk about the alpha situation, which was kind of important.
"Can it wait, Dad? Me and Scott-"
"Stiles,"his dad interrupted, "This can't wait." He looked at Scott and then Stiles pointedly "Maybe we should talk in private." Stiles laughed, Scott shared everything with each other.
"It's about your sister." His laugh abruptly died, except that. Scott had never known that Stiles had a sister.
"A sister, you have a sister?" Scott said incredulously. "How come you didn't tell me?"
"Shut up," Stiles said harshly more harshly then Stiles had even spoken to Scott before no matter how mad he had been, Scott flinched at the coldness.."What about her?" he asked his Dad.
"They say, she's ready to come home now." Stiles stared at his Dad in disbelief and walked away from him. His father followed him and Scott followed the both of them up the stairs and towards Stiles' room
"Stiles!"
"I told you I'm not staying in the same house as her," Stiles yelled without turning around.
"She doesn't have to stay here, just in town." Stiles' father said sounding ver conflicted.
"No, I'm not staying in the same town with her either. You take her in or bring her here, I'm moving out," Stiles said and Scott barely managed to get into Stiles' room before he slammed the door shut. Immediately his friends started pacing up and down the floor ignoring him completely.
"Stiles, why didn't you tell me you had a sister? That's kind of an important thing to leave out." Scott asked a little hurt. Having a sister was a kind of big and important thing to hide. Stiles turned on him and he could see that Stiles' nostrils were flaring and his hands were shaking slightly with anger.
"Why didn't I tell you! Why didn't I tell you? I haven't told anyone no one but me and my Dad knows about her!"
"Why?" Scott asked confused.
"Why?" Stiles started laughing hysterically. "He wants to know why?!" Scott nodded, yeah he wanted to know why, he wanted to know why his friend was acting like this.
"Because she's been in a mental institution for the past 9 years, maybe that's why?!" Stiles shouted.
"You're embarrassed to have a sister that's committed?" Stiles looked at him like he was an idiot. "I'm sorry I just don't get it," Scott said throwing his hands up exasperatedly. It sounded like a good thing. It sounded like his sister was finally good enough to come home. What was the problem with that?
"Maybe you should first ask me why she was committed?" Stiles shouted agitated, more agitated than he could ever remember seeing him before. Scott shrugged.
"Okay, why was she committed?" he asked.
"She's in the loony bin because she tried to kill me!" Stiles shouted.
Is this interesting? Or should I just scrap the idea review and let me know.