"How the hell did you get me in this position TWICE?!" Lexie growled as she slammed her fist onto the cold counter, "I-i-uh-unbelievable! You are unbelievable."

She grabbed her jacket and stormed from the apartment. Her mind was racing and so was her heart beat. She knew she couldn't be angrier than she was now. Mark slept with Callie. He's been telling me for weeks that he loves me and he slept with Callie. Lexie could feel the hot tears streaming down her face as she climbed into the car. She didn't know if they were out of anger or sadness—it was just pain. It took her several minutes before her eyes had cleared enough to drive home.

"Hey, Lex! Uh, why aren't you at Mark's?" Meredith asked as Lexie slammed the door behind her.

She had obviously just interrupted her sister and brother-in-law doing whatever it was they were doing on the couch. She knew she wouldn't be able to get any words out through the lump in her throat so she bolted upstairs instead. There was some mumbling from downstairs and Lexie knew Meredith would be up any second to check on her.

"Lex?" Mer knocked on her door, "do you want to talk about it?" She hesitantly opened the foor. "Do I need Derek to kill him?"

"Yes, please." Lexie managed to choke out. She pulled her knees to her chest and buried her tear-soaked face in her hands. Meredith sat down on the bed beside her sister and wrapped her arms around her. Lexie spent a few minutes crying into her sister's shoulder before she spilled everything.

"Mark—Callie—Mark got Callie pregnant. They—they're having a baby. He did it again. He did it all without m—m—me. He never asked me."

"Oh, Lex, I'm so sorry."

Lexie cleared her throat and continued "If I mean so much to him, why wouldn't he want a family with me? He wants me to tag along with this family he has for himself. I don't want to tag along, I want it to be me—I should be the one having his baby. He should want to do it all with me."

Derek knocked lightly on the door frame. "Lexie, Mark is at the door. Should I send him up?"

Before she could respond, Mark pushed past her brother-in-law and looked at her with his guilty, puppy dog eyes, "Lex…"