Prologue

As much as we might not like it, we all have enemies. Some exist that we don't know about, while others are of our own choosing. There are those that we just don't get along with, while with others we have tried and failed. Some are easy to ignore. Others?

Not so much.

She firmly believed she had every reason to dislike him. Mark Sloan was a manwhore and she was fundamentally against his kind. He made interns fetch him cappuccinos and blueberry scones instead of teaching them the complex procedures they were there to learn. Either he didn't care about the future of medicine or he thought he'd live forever; each was a distasteful thought.

He hit on practically every woman he laid his eyes upon, from anonymous women in bars to hospital receptionists, nurses, and doctors: Addison, Callie, and Meredith included. Yeah, she knew about the way he'd tried to come on to Meredith recently. Seriously? The guy was trouble. Worse, he was an adulterer and she could relate to that… which made her despise him even more.

If there was one doctor in the hospital she wanted to spend the least amount of time with, it was him (or Callie). But, of course, they were stuck together. Everyone else was complicatedly involved in their inter-hospital romances and they- she and he- were the odd people out.

They were spending a great deal of time together- too much time. She was always assigned to him and, by God, his incessant presence in her daily life was irritating. He drove her crazy… as if he was constantly pushing her to the brink and trying to tempt her into jumping off. With that mischievous grin and assistance from the devil himself, he probably could.

One day she'd snap. She'd take the jump. She'd teach him that Izzie Stevens was not a woman to be messed with.

Unfortunately, she'd learn something else in return. She would soon find out that there are five things you shouldn't do with your enemy.