edited for sterek purposes :>
Laura’s in the middle of one of her lectures when Derek catches sight of Stiles walking through the door. Every nerve in his body immediately stiffens, and he forces himself to relax before Laura notices. Unfortunately, Laura’s not the type to let anything pass her by. She pauses.
Stares him down.
Derek can feel his eye twitching, but he doesn’t break, and, he doesn’t look over to where Stiles is rocking back and forth on his heels, rubbing his hands together as he peruses the menu.
Okay, so he might not be looking over at Stiles, but he is aware of every movement Stiles is making.
He doesn’t whimper when Stiles swivels on his feet and catches sight of him and Laura. He doesn’t.
He also doesn’t notice the way Stiles purposefully strides towards them and plonks himself down onto the table over. Laura, however, does.
She kicks Derek under the table. “He’s cute,” she hisses, ignoring the way he grimaces. Derek scowls at her, reaching down to rub at his shin, and not-so-subtly glances over. Stiles is the picture of innocence, but Derek knows he heard Laura, because there’s a smirk that’s tugging at the corner of his mouth, his face carefully turned away so Laura can’t see.
“Laura,” Derek warns, and she makes a face.
“Oh come on, when was the last time you got laid? Like, six months?”
Derek inhales sharply. “Laura,” he whispers angrily, as Stiles chokes, and Laura turns to eye him suspiciously, but Stiles has his phone out, and he looks like he’s laughing on the screen, so she turns back to Derek, whose face is bright red at this point. He didn’t really need Stiles to know that he’d been on a fairly lengthy dry spell before they met nearly two months ago.
A dry spell Stiles had helped him relinquish. Multiple times.
“What? It’s not like it isn’t true,” she shrugs, unconcerned, and Derek clenches his jaw.
“You’re not exactly talking quietly,” he says, still angry. She makes another face, and stabs her fork into an innocent tomato slice.
“I’m just saying,” she mutters petulantly, dropping her gaze down to her plate, and Derek feels the sudden urge to apologize. He hasn’t done anything wrong though, so he shovels a spoonful of mashed potatoes into his mouth to stop himself from saying anything. The mood has gone quiet and somber, and Derek’s wracking his brain for something to say that isn’t an apology, when Stiles clears his throat loudly, and Derek’s phone starts to vibrate in his pocket. He turns to him, sees Laura do the same in his periphery, and wrinkles his brow in confusion when Stiles is tapping his fingers in an irregular rhythm on the countertop, completely oblivious. Derek doesn’t pick up, because duh, Laura, but Stiles doesn’t seem fazed. In fact, his whole face brightens up when he reaches Derek’s voicemail. He settles in more comfortably in his chair, before he catches Derek’s gaze briefly, and he’s suddenly worried about the manic gleam his eyes.
He doesn’t know why, but he has the sudden feeling he should run far, far away.
“Hey,” Stiles’ voice has gone flirty, quiet enough, but still loud enough for both Derek and Laura to hear. Derek can feel his palms start to sweat. “I was just thinking about last night, and,” he pauses and laughs, low and pleased. Derek suddenly feels too-hot in his skin, and he knows he’s blushing. “So I thought I’d tell you now that you better not have plans on Saturday night, because I’m going to sit on your face.”
Derek feels a flash of lust zing through his belly, and he’s staring at Stiles in disbelief when Stiles hangs up, turns to him, and has the gall to wink. Laura, who misses the wink, looks both scandalized and impressed. She mouths ‘wow’ at Derek. “Oh my word,” she says softly, fanning herself. She glances at Stiles then back at Derek again, and a thoughtful look crosses her face.
“No,” he says, before she even opens her mouth.
“You could really use some pointers,” she argues, and before Derek can stop her, she leans over to tap Stiles on the shoulder. “Hi, I’m Laura.”
Stiles raises an eyebrow. “Stiles,” he offers, then laughs when Laura looks absolutely confused. “It’s a nickname. Don’t ask.”
“Alrighty then,” she relaxes into her seat with a smile, before kicking Derek in the shin. Again. “This idiot is my brother, Derek,” she says, not unkindly, and ignores the way Derek scowls at her. Stiles turns and directs a smile onto Derek. It’s hard to miss the way his eyes flick up and down his body as he blatantly checks Derek out, but Laura’s still talking, oblivious. “He’s a bit… Well, tragic is a bit mean, so we’ll stick with horrifically ungifted in the art of being smooth,” she was saying, and Derek wasn’t sure if he wanted to kill her, or himself.
Stiles bites a lip, looking like it’s killing himself not to laugh. “Is that so?”
Laura nods, and she pins Stiles with her most effective puppy dog expression. “I overheard you on the phone -“
“Did you?” Stiles asks, eyes wide, like it’s any news to him, and Derek falls a little bit in love with the smirk curling across his face. “I’m so sorry about that.”
Laura waves the comment away.
“No big, I was just wondering if you could give him some, I don’t know, pointers or something?” Stiles’ eyebrows flew up, and this time, he couldn’t hold back the snort. Laura sighs, put upon. “I know it sounds silly, but I just want him to be happy, you know?” Despite it all, Derek feels a rush of fondness for his older sister. “I think he’s forgotten how.”
Or maybe not.
“Didn’t you have a meeting to get to?” Derek butts in rudely, watching in satisfaction as Laura glances at her watch and swears.
“Please, at least think about it,” she begs Stiles, as she’s standing and double checking she has everything in her bag.
Stiles shrugs. “I don’t see why not? I’m free right now, so if Derek’s not busy…” he trails off, and Laura squeals in delight.
“He’s free until six!” she hollers, before bending down to hug Stiles quickly. “Thanks, cutie,” she winks, and leans over the table to kiss Derek on the cheek. “Try to remember how to flirt, grumpy puss,” she teases, but her voice is fond, and she laughs when Derek scowls at her. “Love you.”
“Yeah, you too,” he sighs, and she disappears, leaving him with the check. Again.
He belatedly remembers Stiles, who’s watching him with a soft look on his face. “I’m so sorry about her,” he says lamely, and is totally not expecting the way Stiles throws his head back to laugh.
“Are you kidding? That was hilarious,” he says, glancing out the window to where Laura’s disappearing into a cab, shooting them a final wave. “You’re not smooth?” he asks, before he hums thoughtfully. “I seem to recall you being pretty smooth when we met.”
Derek rolls his eyes, but Stiles can tell he’s pleased. “Laura is Laura. She has her own ideas about things,” he says, and hooks his ankle around Stiles’ under the table.
Stiles bites his lip, and smiles up at Derek slyly. “I really am free right now, if you wanna?” he waggles his eyebrows, and despite how ridiculous he looks, Derek can hear the heat underneath the words, and he nods.
Stiles beams at him.
When Derek brings Stiles to dinner the next Friday, Laura’s smug for about ten seconds before they tell her they’d been dating the entire time.
She kicks Derek in the shin, and he doesn’t even say a word.