A/N: There will be probably be some Alex/Callie/Arizona interaction coming up, and I'm trying to decide if I want the whole Calzona/Lauren cheating thing to happen or not in my little Alex/Iz world. Shonda needs a swift kick, more than once, sometimes... Anyway, my notifications were screwed up for a day or so, so if I usually reply to you and didn't, I apologize! Also, I always call out the guest reviewers because I can't reply to them like you other guys, so Julia - thanks and hope you'll keep reading! And Rasa, that sounds so cool! I'd love to see illustrations. I'm gonna keep on keepin' on, so thank you all for reading!

Chapter 12: Tell Me How My Nature Feels

Alex didn't hesitate when Izzie suggested that they go back to his house. In fact, he had taken her hand and quickly pulled her through the parking lot of the hospital toward the direction of his house. Izzie had followed behind, giggling like a school girl, making jokes and pretending to dig her feet into the concrete to slow him down. All pretense of why Alex had even gone to the hospital had left his mind. He just knew that Izzie wanted him, and he wanted her more than anything in that moment. The first night he had seen her again in the Emerald City Bar, his thoughts automatically had been directed on her body, which was something he had always loved - even before he had actually fallen in love with her. Seeing her again in person had only made that fact more palpable. The little moments they had already had together, the kisses, the sexual tension, it was driving him crazy.

Izzie still laughed as they reached his front door, and he shuffled through his pockets looking for his keys. She had stepped up to him, her arms wrapped around him, planting small kisses on his lips as he looked for his keys.

"Really, Alex? Really? You never lock your door except this one time?" She asked, laughing a little against his mouth.

"I didn't know I was gonna be bringing a hot chick back to my place," he said, laughter in his voice, and turned her around to put her against the door. He had fished his keys out of his pocket and unlocked it behind her as they kissed passionately.

"Lucky for me, you did," she said, and they entered the house, a tangle of lips and hands.

"Pretty lucky for me, too," Alex said against her mouth. He lifted up her shirt, tugging it over her head, and tossed it aside. She pulled his over his head in another blur of flying clothes.

Alex bent his head down, kissing her neck, moving her in the direction of the couch. Still kissing him fervently, Izzie's legs hit the couch and she tumbled backward onto it, bringing Alex down on top of her. He was already highly aroused, and when he saw the full picture of her half-naked and under him, he felt an erection begin to grow. Reaching down to unbutton her jeans, he placed small kisses down her chest, across her breasts, and the soft skin on her stomach.

Izzie felt like she was on fire from his kisses. He tapped her thigh with his fingers, signaling that he wanted to take off her jeans. She lifted her torso and he worked her jeans and panties down her legs, kissing her thighs and as he went. He unzipped his own jeans to let his erection free, and then moved back up her body, looking at her through heavy-lidded eyes. Staring at each other for a few seconds, he then ran a hand through her hair, and kissed her deeply. She had an arm around his shoulder, and she sat up a little, holding onto him, while taking off her bra. Another blur of discarded clothing flew through the air and landed in the floor. He placed a hand between her legs and pushed a finger inside her. She was already hot and wet, and she began to breathe a little heavier as he moved it in and out of her.

"Alex," she whispered breathlessly, "I need you."

He felt her hand travel down his torso and grab his hard cock. She gently worked her hand up and down his length. His breath hitched in his throat. It had been so long since she had touched him intimately, but she still knew exactly how to touch him. She unbuttoned his pants, and he stretched one leg onto the floor to get one leg out, nearly falling in his attempt to get the other leg out.

"Son of a bitch," he said as he toppled over, and she giggled, sitting up and grabbing his arms. He pulled her against him, her naked breasts pushing against his chest, and he kissed her deeply. Wrapping her arms around his neck, he laid her back against the couch again and positioned himself over her.

"You want this?" He asked softly, making sure.

She nodded.

He rocked his hips forward and pushed himself into her. Her body was tight and hot, and he groaned slightly as he went in deeper. Izzie gasped, digging her fingernails into his back. He smirked down at her. "You like that?" He quickly pulled all the way out, hovering over her.

"Oh, god, why did you stop?" Her voice was both husky and exasperated.

Grinning, he slid slowly back into her.

"Mmm," she gasped, arching her back. Then he pulled out again.

"Alex Karev, you are a fucking tease! Either put it in and leave it, or lose it," she had reached up and grabbed him by his hair, talking through gritted teeth.

"Shut up."

Alex liked to tease Izzie, liked to make her crazy. Half the time she made him crazy and she didn't even realize it. He had to balance the equation in any way he could. And in their past relationship, there had been missteps, but this part had never been one. Every emotion came through, almost as a cleansing experience. Volitility. Passion. Anger. Love. Everything was fair game when no words had to be used.

They both moved together with fluidity, their bodies in sync with one another. Alex had been with plenty of women, but none of them had ever responded to his touch quite like Izzie did. He moved against her, and she wrapped her long legs around him, moving to meet his thrusts. Her heavy breathing in his ear caused him to quicken his pace, and she dug her fingernails into his back, tightening her legs around him. She moaned his name into his ear and he felt himself beginning to get ready for release. Izzie's mouth felt like it was everywhere - his face, his neck, his earlobes - her breath catching in her throat.

He felt her mouth on his shoulder, her teeth and tongue pressing into his skin as she lightly bit his shoulder while making small sounds of pleasure. This sent Alex over the edge, and he groaned, thrusting hard into her. She cried out, biting him a little harder, and they both came at the same time. Alex collapsed on top of her in a hot, sweaty tangle of legs and arms. Both of them were breathless and satisfied.

"Oh. My. God. Seriously?" Izzie said, still trying to catch her breath.

Alex, his head against her chest, smirking a little.

Izzie reached up and combed her fingers through his hair and kissed the top of his head. Her legs were still around him.

"Alex?"

"Hmm?" He was enjoying just lying on top of her, feeling her brush her fingers through his hair. He didn't have to be afraid to touch her anymore, afraid to breathe around her, and it felt amazing.

"Look at me."

He raised up on his arms, lifting his head up to look at her. She kissed him, allowing the kiss to linger.

"We have time to do it again before my flight," she said seductively.

He grinned.