Disclaimer: I don't own anything. It all belongs to Shonda. I just use her characters and some storylines to bend the characters to my will.

A/N: This is my first fanfiction and the first time I've ever published anything. Please comment and let me know what you think and if I should continue. Thanks! Enjoy!

Realizing a Mistake

After leaving Mark's place, I was already questioning why I ran out. I knew we weren't together when he slept with Callie but at the same time am I willing to be another mother to this child who will already have two mommies. Going up to the attic of Mer's, my relationship with Mark plays through my mind with each step. The first time I told him to "teach me;" hiding in the attic so Derek wouldn't find out about our relationship; or comforting him after his and Derek's fight over us dating. At the top I realize all of our good times greatly outweigh or bad times, and our break ups. I love Mark more than anything. I'm in love with Mark and have been for a long time. It's difficult though, between Sloan showing up and his on/off sex relationship with Callie that goes with our on/off relationship.

Laying in my bed I realized I'm not mad at Mark and Callie; I'm mad that it's not me having his firstborn. I want it all with Mark. The marriage; the family; the Christmas mornings, I just never wanted them with Callie except with her as the cool Aunt. I don't know how Arizona is handling all of this. The love of her life is having a baby with her best friend. After contemplating my decision for what seems like hours even though it's only been about 30 minutes I now know what I need to do.

Instead of taking the elevator I decide to walk the five flights of stairs that lead to the apartment I used to share with the love of my life. Getting to the blue door that has a 501 on it and knocking I don't hear any noise so I let myself in with the key I still had. Searching the apartment I found no Mark Sloan. My next stop was to check 502; when all I hear is Mark yelling, "How could I do this to her?"

Knocking over Mark's yelling Arizona answers the door, "Hey, Lex!"

"Arizona, can you tell Mark to meet me at his place?" Not waiting for an answer I cross the hall and close the door.

"Hey Mark, that was Lexie. Go home and let me have a night alone with my girlfriend." Arizona says pulling him to the open door.

"Well geez Blondie, don't get your panties in a twist!"

"Then, get out of my apartment."

"Fine, thanks for letting me vent Cal," I heard Mark yell through a slamming door in his face.

Hearing the door open and close I don't turn around from my position at the kitchen counter.

"Lexie, what's going on? I though you didn't want anything to do with me?"

"Mark, we need to talk…"

"It never ends well when on of us says that."

"Mark, will you just listen to me please!"

"Sorry, Lex; go ahead."

"I love you! I want a family with you and I think… no I know that's why I'm so mad because it's not me giving you, your first born, well technically second born, but the first who's life you will be apart of from the beginning, and I wish it was me giving you that. I want a forever with you and if that means being a third mom to this little boy or girl; I'm all in."

"Really?"

"Yes!"

"You need to be sure Alexandra because we can't start this and then us be off again."

"I'm in this Mark."

"Then I have something to say."

"Okay," I know I'm giving him a strange look with that okay.

Watching Mark get down on one knee and pulling out a ring all I hear is "Please marry me Alexandra Caroline Grey and make me the happiest man in Seattle?"