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The confrontation happened in the parking lot. Derek met Mark on the way to his car. He tried to resist, but Mark being Mark, couldn't resist making a snide comment.

"Izzie must be amazing in bed for you to get this riled up. I know you hit me before, but the look in your eyes is screaming murder. I'm a little frightened, I have to admit." Mark threw a smirk at Derek.

"I told you to stay away from her and I meant it. I saw you grab her in the hallway." Derek took a menacing step toward Mark, "Do it again and we'll be more than talking about it."

Mark turned around and smirked. "Man, Derek, you've got it so bad." Derek couldn't stop himself. He reached up and punched Mark. Mark fell back into his car. To Derek's surprise, Mark just began to laugh a little.

"Yeah, you're definitely in love." He wiped the blood from his lip. "I never wanted Izzie, Derek. You were ruining your relationship. I knew you were watching me in the hall with her."

"You were acting?" Derek clearly didn't believe Mark.

Mark rolled his eyes, "Of course. You and Izzie are a couple. Believe it or not, Derek, you're my friend. I don't want to ruin that again. I was trying to push you into realizing your feelings."

Derek grinned at Mark, "Thanks, but it was totally unnecessary. I already know I love her. I told her earlier today. And when did you turn into Oprah, telling me to realize my feelings?" Mark's expression fell.

"So I just let you punch me in the face for nothing?"

"No. Not for nothing. I appreciated it, a good stress reliever." Derek smiled and patted Mark on the back and he continued to his car.

To his happy surprise he found Izzie waiting for him when he got back to his trailer. She grinned at him happily and stood up to meet him.

"I brought dinner," She lifted a bag of Chinese food.

"Smells good," He told her as he opened the door.

"Me or the food?" She nudged him with her shoulder.

"Both?"

"Wrong answer." Izzie moved past him and moved to the tiny kitchen.

"Well, then, which is correct?" Derek reached out and stopped her by grabbing her hand.

Izzie turned around and grinned. "Depends on which you want to have first, me or the food?"

He reached up and cupped her cheek with his hand. That was when Izzie noticed the small bruises on his knuckles.

"What happened, Derek?" Izzie grabbed his hand and pulled him into the bathroom for more light. She bent over and examined his hand.

"I punched Mark," he explained, causing Izzie's head to come up sharply.

"What?" She asked.

"In the parking lot. I punched Mark. It actually felt really good."

"You could have hurt yourself. Your hands are your tools!" Izzie scolded.

"It does kinda hurt. You know what would make it feel better?" Derek reached up and brushed the hair from Izzie's brow. "Kissing you."

"You don't think you can get out of—Izzie was cut off as Derek pulled her to him and kissed her soundly.

"Have a little pity, Iz." Derek pleaded in between kisses. She gently pushed him toward the bed and they fell onto it.

"So, the food is cold now." Izzie said as she marched into the kitchen wearing one of Derek's shirts.

"That's why I have a microwave." Derek shot at her as he pulled on his boxer's.

"See, I knew that was why I loved you. Because you are so smart!" Izzie said sarcastically.

"I thought it was my sexy body that did it." Derek leaned against the door frame and watched Izzie heat up the food.

"That too. It's the whole package."

"Izzie, marry me." Derek blurted it out. He hadn't really thought about it before now, but it just felt right. Izzie froze, the fork halfway to her mouth. "I know there are a million reasons why this is a bad idea, but I don't care. I want to be like this forever. You here with me. And I don't want to hide, I'm proud that you're mine. I love you."

"Ok. But we are going to have a long engagement." Izzie turned to him and smiled then launched herself at him.

"Whatever you say, Iz, as long as it's yes." Derek hugged her to him.

"Yes." Izzie grinned and kissed him.

The end, finally. I'm sorry it took so long. I have lost all inspiration for Grey's stories because the show officially sucks. Until they make Izzie get with someone other than George, I refuse to watch. I still love the previous seasons though!!