**Disclaimer: Unfortunately, I do not own any of these characters. This is just fiction.

Summary: My outtake on what should have happened if Susan would never have left.

Last time on ER. "Susan, I love you. I loved you for a very long time. You're my soul mate. I want to spend the rest of my life with you. I want you to be my wife. Will you marry me?"

"And how is County's best couple today," asks Doug?

"I thought we were County's best couple," whispered Carol.

"We are just humor them," chuckled Doug.

Mark holds up their hands and points to the ring. "We're engaged that's how we are." Everyone stops what they're doing and looks at Mark and Susan. Carol smiles. OH my gosh, you guys! Congratulations! That's so wonderful "Will you two be our best man and maid of honor?"

Carol smiles, "We'd be honored."

"Yes we would," remarks Doug, "besides it'll give us practice walking down the aisle together," he winks. 5 months have gone by. 5 months filled with many, many wedding plans. And alas the day has arrived. Susan is getting dressed in her bridal room and Carol is helping her. "Oh my goodness Carol, can you believe this day is here? I'm so nervous. I can't believe it. My dream has come true, I'm marrying Mark today," exclaims Susan!!

Carol hugs Susan. "You make a beautiful bride. I am so happy that this day has come. I always hoped one day I'd see the day when you and Mark got married."

There's a rap at the door. "Come in, unless your Mark," says Susan. The door opens. It's Doug. 'They'll be ready to start in five minutes. We need to get ready."

They all line up in the back of the church. Music begins to softly play. Mark turns and faces the back of the church. Doug, the best man escorts Carol, the maid of honor. Followed by Benton and Haleh and Carter and Chuni. Followed by Rachel, the flower girl and Joey the ringbearer who is a friend of Susan. Then, here comes the bride begins to play. Susan slowly makes her way down the aisle towards Mark escorted by her father. Familiar faces are around. Jen, Chloe, little Susie, Kerry, Anspaugh, Morgenstern, Jeanine, Lydia, Connie, Jerry, Randi, and many more of their family and friends. Susan's father lifts her veil and then hands her over to Mark. He takes her hand and they face each other. The pastor begins.

"We are gathered here together to unite in holy matrimony two soul mates, Mark Greene and Susan Lewis. If anyone feels that these two should not be joined together speak now or forever hold your peace. Very well. Who gives this woman to this man?"

"Her mother and I do," says her father.

"Susan and Mark have chosen to write their own vowels. We'll begin with Mark."

With tears in his eyes, Mark begins. "Susan, we've been together for a long time now. Best friends for even longer. But now, in the presence of our family, friends, and each other I solemnly vow to love you, cherish you, I will take care of you when your sick, enjoy the fun times, work through the hard times. You are my soul mate. I love you so much. I love being with you. You're my destiny, my Valentine, I love you Susan. Today is the first day of the rest of our lives. I can't wait for it to begin." Mark, who is crying, wipes his eyes with the back of his hand.

Susan begins, "Mark, I love you so very much. Your everything to me. I can't imagine what my life would be like if I had gotten on that train and went to Phoenix. We wouldn't have this amazing, special relationship. But it's not the what if's that are important. It's the what is. And that what is is that we're together and today we begin the marriage portion of our relationship. And I am so looking forward to all the memories this will hold for us. I promise to stick by your side through all seasons of life. The good and the bad. I will never leave you. I love you. And I'm so thankful and honored to be your wife. I love you."

"May I have the rings please?" Joey hands the minister the rings. "Mark take the ring and place it on her finger and repeat after me. With this ring."

"With this ring."

"As a token and sign of my love to you."

"As a token and sign of my love to you."

"I thee wed."

"I thee wed."

"Now Abby take the ring and place it on Mark's finger and repeat after me. With this ring."

"With this ring."

"As a token and sign of my love to you."

"As a token and sign of my love to you."

"I thee wed."

"I thee wed."

"I now present to you Mr. and Mrs. Mark Greene. You may kiss your bride."

Mark and Susan embrace in a beautiful kiss. They waltz down the aisle arm in arm and proceed to take pictures followed by the reception. At the reception there is lots of food, dancing and fun.

Then Doug stands up and says, "As the best man it is my civic duty to give a speech. Mark, you're my best friend. We've been through so much together. And I am so glad that you have found happiness and love in your other best friend Susan. From this day forward may your love stay strong. I am so thrilled to be a part of this special day. Congratulations, to two of my best friends. I love you both and you are what has inspired me to do what I am to do now. Not to take the focus off your day but I couldn't think of a better moment than right now. Carol, please join me." Carol joins Doug and stands by his side. Doug grabs her hands and reaches into his pocket. "Carol, through the years we've always been there for each other in some form. We've been just friends and lovers and even the times when we didn't speak much at all. But this I know. You're my life, my soul my best friend and my love. I believe we were put on this earth to be together. You're my destiny. I love you. Will you do me the honor of being my wife? Carol, will you marry me?"

TO BE CONTINUED..