Author's Note: Thought I'd try my hand at some Evil Stiles after that 3B promo. The story and chapter titles are from the Jekyll & Hyde musical. Thank you so much for reading.

The ropes dug into her skin. She strained against them. It would be easier to just relax and stop trying but she needed the distraction.

Nothing about this was okay. Nothing about this could be real.

But it was.

She should have known something was wrong with him. She should have known something about him had changed. She had known something was different, but she didn't think this was this.

One Week Earlier

Stiles and Lydia were always paired together. Any time the pack needed to do something and split into pairs, Stiles and Lydia were always a duo.

When Lydia thought about it, it didn't really make sense. Shouldn't they each be paired with Allison or a wolf? If they were attacked, who was going to defend them?

She eyed Stiles who had his eyes glued on the road. Her eyes raked over his body. Lacrosse had given him decent enough muscles. Maybe he wouldn't be totally useless in a fight. Her gaze stopped at his hands, wrapped around the wheel. It was hard to imagine them balled up into fists. She'd definitely be better off with Allison.

"Everything okay?" Stiles snuck a look at her. She couldn't help but notice the genuine concern in his eyes. He wasn't asking to fill the silence, or to prove to her he was paying attention. He really wanted to know.

"Mhmm," she nodded, not wanting to admit that she was kind of checking him out.

They got to the area they were supposed to be searching. Stiles got out of the car and she could see him trying to hold himself back from racing over to the other side of the car and opening her door. That was his new thing lately, desperately trying to hide how much he cared about her. Like he didn't want to burden her with his affection.

Somehow, Lydia found this even more of a burden. He thought about her so much. Sometimes it felt like his every action existed to cater to her and how she felt. It was hard sometimes, living up to the person Stiles saw her as.

She knew he was only on edge because of Aiden. It's not like things had been easy between the three of them. She'd been hooking up with Aiden to get information out of him, she'd kissed Stiles to save him from a panic attack, become Stiles' anchor to the world of the living, and then started dating Aiden. Lydia remembered thinking her romantic life was complicated when she and Jackson started dating freshman year. Things had really changed.

Stiles led her into the building they were checking out. He opened the door and she slid past him. As she did, she couldn't help but be put off by his scent. Laundry detergent, soap, and that undefinable boy smell. Lydia's stomach clenched. She shook her head, trying to clear her head.

"Why don't you check upstairs?" the words escaped her mouth before she could even think them over. She just wanted to put some distance between herself and Stiles and his stupid boy smell.

"You sure?" his face was full of concern. Why was he always like that? She could take care of herself.

"Yes, Stiles," she snapped. "The sooner we're done here, the sooner I can go home."

"Okay- yeah, sure," Stiles compulsively straightened the hem of his shirt.

Lydia pushed down a smile. Partially because she'd gotten what she wanted and partially because she always felt a small surge of pride whenever she made him squirm.

Lydia walked around the first floor, checking doors, corners, under the stairs. Nothing. This was a waste of time. They never found the evil thing before it wanted to show itself. Two years of this and you'd think they'd have learned to get ahead of the curve. But no. Evil always got the drop on them.

Just as she thought this, she heard a crash upstairs.

"Stiles!" she yelled, her heart jumping into her throat.

There was no answer. This was why they shouldn't be paired together. He should have been with Scott. Scott could protect him. All Lydia could do was scream.

"Stiles!"

Lydia's feet flew as she ran to the stairwell. She wrenched the door open and found herself face to face with-

"Hey," Stiles smirked.

Lydia was breathless, her heart was beating a mile a minute and for a moment she couldn't say a thing.

Stiles waited, watching her in amusement as she caught her breath.

"Stiles," she exhaled. She hit him in the arm, which she couldn't help but notice was very firm.

Stiles laughed.

Lydia did not like being laughed at.

"What the hell were you doing up there?"

"I knocked over some old paint cans," Stiles said, still grinning at her knowingly. "Did I scare you?"

"Yes, you idiot. For all I know, you could have found the creepy monster Derek sent us after. For all I know, you could have been dead-"

"And you care?" Stiles raised an eyebrow.

His calm completely unnerved her. It was like they had switched places and suddenly it was Lydia who couldn't keep it together around him.

What was she suppose to say? That she cared if he died? Of course she would care. They were friends. Friends were allowed to care if another friend died. But somehow, she didn't think that was what he was implying.

"Of course, I-"

But he cut her off. Before she knew what was happening, one of Stiles hands had grabbed her by the back of the neck. He was pushing her up against the wall. His other hand found a place against the wall, next to her head. His lips crashed into hers and for a moment she couldn't react. His thumb trailed down the side of her face as she felt him bite at her top lip. This couldn't be the Stiles she'd kissed a month ago.

Against her will, her lips shaped around his. She took his bottom lip between hers and he almost growled. And when he did she couldn't help but practically sigh into his mouth. What the hell was going on?

Suddenly, the hand that had been on the wall was now on her hip. And it was moving its way up her body.

Lydia slid one of her hands through his hair, the other clutched his shirt. She was pulling him as close to her as was humanly possible. He was so warm.

She gasped as his hand slid up her shirt and made its way to her ribcage.

She bent at the knees and without having to say anything, Stiles lifted her up, her legs wrapping around his waist. He grinded into her and it was all she could do not to moan.

The wall scraped her back but she didn't care. Stiles' mouth had broken free from hers. We was kissing her jaw, now her neck. He stopped at her collarbone, his lips brushing up against it, faintly.

"Stiles," she groaned.

His lips met hers again. Their teeth clacking together as they kissed.

She gasped for air, and rested her forehead against his, and looked into his eyes.

The first time she'd kissed him he'd stared at her in wonder, like he didn't even know how to begin to tell her how perfect she was.

Now he just looked... hungry.

One Week Later

That's when she should have known. If she hadn't known when he kissed her without asking or made fun of her when she worried about his safety, she should have known when he had looked at her like that.

But she didn't.

Maybe it's because her phone rang seconds after. It was Allison, telling them they'd better come back because she and Isaac had found something. It turned out to be a dead end. Evil had eluded them again.

Probably because it was staring Lydia in the face right now. And it looked just like Stiles.