Derek turned around to see his wife and his stomach dropped to the floor. He'd been caught. Shit. He looked back at girlfriend. "Meredith I am so sorry" he said as Addison walked towards them. How the hell did this happen? He looked back at Addison with a spiteful grin on his face. "Addison, what are you doing here?" he breathed.

"Well you would know if you'd bothered to return any one of my phone calls" she spat at him. Yeah he really should have done that. No this would have happened eventually. He couldn't keep it secret forever but did it have to end now.

"Hi I'm Addison Shepherd." Addison extended her hand to Meredith to shake.

How polite, Satan.

"Shepherd?" Meredith squeaked glancing to Derek.

She doesn't deserve this. Meredith didn't do anything. Stop punishing her.

"And you must be the woman who's been screwing my husband."

And the world just went up in flames.

Derek turned to leave and stopped dead in his tracks. Meredith saw the woman walking towards them. What's going on? Who the hell is she? Derek turned to her "Meredith I am so sorry." Sorry about what? What is going on?

"Addison, what are you doing here?" he breathed. Ok so he knows her.

"Well you would know if you'd bothered to return any one of my phone calls" she spat at him.

She's pissed and I'm still lost. Wait, is that who's phone call he ignored this morning?

"Hi I'm Addison Shepherd." Addison extended her hand to Meredith to shake.

Ok it could be a sister though they don't look anything alike. Who am I kidding?

"Shepherd?" Meredith squeaked glancing to Derek.

"And you must be the woman who's been screwing my husband."

Meredith felt like she'd been slapped in the face. All the air was sucked right out of her chest; she couldn't breathe. What the hell Derek?

There they are, Addison thought bitterly as she walked towards her husband and his mistress. "Meredith I am so sorry." Oh shut up you bastard.

"Addison, what are you doing here?" he breathed. Don't be stupid.

"Well you would know if you'd bothered to return any one of my phone calls" she spat at him. She turned to face the other woman, "Hi I'm Addison Shepherd." Addison extended her hand to Meredith to shake.

"Shepherd?" Meredith squeaked glancing to Derek. That's right girly.

"And you must be the woman who's been screwing my husband." So get the hell out.