A few years ago…

"Oh whoa hold up," Dexter lowered Sarah to the couch but she didn't release his neck.

He laughed at first, but then he tried to pull her hands away a little more forcefully.

"Sarah," he reached up to loosen her grasp but she looked up at him.

The look in her eyes was different. It wasn't the same sad, hopeless look that she'd given him when he scooped her off the floor outside of her boyfriend's apartment.

"Thank you for coming to get me, Dex," she whispered. Her breath smelled like alcohol. Although he'd literally had to carry her from the car two minutes earlier, she suddenly seemed alert.

She kept her hands clasped around his neck, and to avoid leaning on her, Dexter lowered one of his knees to the couch.

"Sarah, let go. You're very welcome."

Of course, he'd had to go and pick her up. Hearing her crying, and her speech slurring, he wasn't sure what exactly was wrong. When he'd gotten there, he was glad that she'd called him. Anything could have happened to her lying in the hallway, drunk and upset that her boyfriend had broken up with her and locked her out.

Her boyfriend was trash anyway.

Sarah moistened her lips

"You're the only guy that's ever been there for me…Dad wasn't even ever here."

Dexter paused for a moment. There was pain in her eyes—pain that Dexter couldn't empathize with, but pain that intrigued him.

Am I to blame? Harry did spend every free moment with me, sometimes neglecting both Deb and Sarah in the process.

Dexter finally pried her hands away from his neck and he pulled away from her, rising back to his feet.

She sat up. Her red, checkered, and unbuttoned flannel long sleeve slid off one of her shoulders, revealing the spaghetti strap of her white tank top underneath. He could tell that she wasn't wearing a bra.

"I mean it, Dex."

Dexter turned away from her and the emotions that spilled from her mouth.

"You're the only stable guy in my life."

"Sarah, just lay down. You'll feel better in the morning. Get some sleep," he mumbled as he started walking towards the kitchen to get her a glass of water.

"Wait!"

Dexter turned and she threw herself at him. Her lips crashed against his. She grasped his face with both of her hands, softly but desperately.

He pulled away from her in shock. "Sarah!"

He stared back at her.

"God I'm so stupid," she took a few steps backwards.

They stared at each other for a few seconds before she turned away from him and grabbed her purse from the couch.

"No, you're not leaving," Dexter made it to the door as she opened it. He closed the door back forcefully.

"I'm not that drunk Dexter! I can take care of myself!"

Dexter fell silent. Perhaps she had been more emotionally crippled than drunk.

But she did not fight him to open the door back. She merely sank into it and turned to face him, leaving their bodies and faces only inches apart.

Dexter was still in shock. But was he more in shock of her kissing him or more in shock that he actually felt something when she did? A surge of something bubbled up to the surface.

Sarah was the kind of girl that normal guys would and did find irresistibly attractive.

If he were a normal guy then he figured that the fact that they were bound in an odd sibling relationship wouldn't have mattered to him or stopped him from being attracted to her physically.

Part of Harry's code had been to keep his sisters safe, protect them if need be, but he was sure that what he was now thinking was not part of it.

Dexter lowered his eyes to her lips.

What was that I felt?

He watched her swallow hard. She lightly brushed her tongue across her bottom lip.

This is wrong.

She reached up to his chest, dragging her fingers slowly until she reached the neck of his shirt. She closed her fingers on it, tugging gently.

Dexter had never seen the look in her eyes before. She was actually turning him on.

We've already kissed once.

He couldn't believe what he was thinking but he actually wanted to see if he felt the same feeling again.

Dexter reached up and grasped her neck with one hand gently as he leaned in to her lips.

As soon as her soft lips touched his, he felt it again- a fluttery shock that traveled through his body. It was different than he'd ever felt before. It wasn't the usual turned on feeling he got when he had sex or messed around with someone. This was so much stronger.

She kissed him back, slowly at first and then more fierce. She teased his lips with her tongue until he opened his mouth. Their tongues met and intertwined. She threw her arms around his neck and pushed her body closer to him. Dexter breathed her in as they kissed. She still tasted like alcohol, but she smelled like a mixture of that and her perfume.

Dexter allowed his hands to roam her body, moving down her to lightly brush her breasts before letting them fall to her waist and hips.

He knew that he was throwing all caution to the wind, but he didn't care.

Sarah moaned softly against his mouth.

She finally pulled away and looked up at him. They locked eyes for just a moment.

Sarah raised her hands to push against his chest, pushing him back towards the living room.

Dexter grabbed her arms and pulled her body back against his as he took a few steps backwards.

Their lips met again, crashing together desperately as they stumbled together towards the couch.

This is wrong.

Dexter pulled away from her when he felt the couch against the back of his legs.

But she took the opportunity to discard her red checkered flannel. It fell to the floor.

Dexter looked at her breasts, barely hidden underneath the thin fabric of her white tank top. He could see her nipples hard through her shirt.

"Sarah," he began, but his voice was full of emotion.

"Shhh," she reached for the hem of his black shirt and he allowed her to lift if over his head.

She ran her palms down his chest. "We deserve this," she whispered.

Dexter watched her as she focused her attention on his jeans, or rather what was inside his jeans.

She kissed him again as she fumbled with the button on his jeans.

The argument he was forming in his head dissipated at the taste of her kiss again.

Instinctively, he reached down to unbutton her shorts. He pushed them off her hips and let them fall to the ground. She pushed his jeans down and she pushed him back towards the couch. Dexter sat down and looked down to see what she had been wearing underneath her shorts. She had on a pair of lacy red underwear. Normally, Dexter was not normally the type to get overwhelmed by a little colored fabric or lace, but he was taken back this time.

He kicked his jeans off of his legs as she climbed right on top of him.

She lowered herself down on his erection and grinded on him lightly. Dexter held the back of her neck and allowed his hand to tangled in her hair as he kissed her again.

It was her kiss that was the most intoxicating to him. It made him just want to forget about all of the slow stuff. He was never much of a fan of it with other women anyway.

Dexter reached down and slipped her underwear to the side, allowing his fingers to lightly brush against her sensitive area and entrance. He didn't care about the two of them getting completely unclothed, he just wanted to be inside her now, to know what it was like.

He pulled himself out of the opening of his boxers and pushed her underwear to the side again. Her kissing slowed and he pushed himself inside her.

She gasped against his lips, and his body shivered with emotion as she adjusted her body to allow him to slide all the way inside. It was as perfect as he imagined it would be.

She did most of the work, riding him as she took turns kissing his lips and lowering her face to his neck as she sighed and gasped.

Dexter was pretty sure that she finished twice or more by the time he finally gave in and allowed himself to spill himself inside her. It was intense and perfect and more than he had ever felt before.

But once his waves of pleasure subsided, he became very aware of the awkwardness of their situation.

I just finished inside of my sister.

They were both breathing hard and sweaty. Her head was still against his neck and shoulder as reality rushed back to him.

He wondered if she was thinking the same. He gritted his teeth as he waited for her to sit up.

I am so stupid.

When she finally raised her head, she didn't look at him. She sighed tiredly as she lifted herself up off of him and rolled to the side so that she could sit on the couch beside him.

Dexter placed himself back in his jeans and then stared ahead as the silence filled the room around them.

The fact that she wasn't speaking made him nervous.

She regrets it.

Dexter was trying to form some sort of question in his mind when he heard his phone ringing from the kitchen. He jumped up to get it without thinking. When he reached it, he turned back in time to see her buttoning her shorts and grabbing her purse and flannel shirt.

"Where are you-"

"I'm going home," she answered him quickly without looking at him and headed for the door.