The next week went by fast. Mark and Lexie worked but they also spent a lot of time with their children. Mark was really nervous about the proposal, he planned to do it on Lexie's birthday party on Friday in front of their friends. He told Derek about it before he bought the ring and apparently he had told Meredith, but they were the only ones who knew. He had prepared a little speech and he felt ready for it when he woke up Friday morning. He didn't have a surgery until 1pm and Lexie was free the whole day. So he woke up early and made breakfast and then he and the kids walked into Lexie's room to give her the birthday breakfast.

Mark started to sing and the kids sang along

Happy birthday to you. Happy birthday to you. Happy birthday dear Lexie, happy birthday to you.

''Thank you my darlings.'' Lexie said and kissed and hugged Sofia and George who gave her a present and then walked out to play with their toys again.

''Happy birthday.'' Mark said and kissed Lexie.

''Thank you, babe.'' Lexie said and gave Mark a long passionate kiss.

''You'll get my gift on the party tonight. That one is from the kids.'' Mark said and pointed at the box that Sofia and George gave her.

''All of the Rizzoli and Isles seasons? You want me to believe that two kids chose this?'' Lexie said and laughed. Mark knew how much she loved the show about the medical examiner and the woman detective.

''Yes of course they did.'' Mark said like it was the most obvious thing ever.

''If you say so.'' Lexie said and ate her breakfast.

Lexie spent the rest of the day preparing for the party and taking care of the kids. The party was at Meredith and Derek's house since they had a much bigger place than Mark and Lexie. Lexie had just finished setting the tables when the first couple arrived. It was Jo and Alex.

''Hi Alex!'' Lexie said and hugged him.

''Hello birthday girl.'' Alex said and gave her a present.

''Thank you so much.'' Lexie answered and hugged Jo and talked to her for a while. And after that people dropped in every five minutes. 40 minutes later Callie and Arizona, Cristina and Owen, Teddy, Richard, Bailey and Lexie's sisters and her dad had all arrived.

''Where's Mark?!'' Lexie said and was getting anxious when he didn't answer his cell and his surgery was supposed to be finished more than an hour ago.

''I'm sure he will be here soon.'' Derek said. He knew that Mark was at his own place and was preparing for the night when he and Lexie arrived home as fiancé and fiancée.

''Yes, I'm sure.'' Meredith said and smiled at Derek since she knew too.

''I'm here! Sorry that I'm late, I had some difficulties in the surgery.'' Mark said when he arrived just a few minutes later.

''It's okay.'' Lexie said and everyone talked for a while before they started eating. And after that Lexie opened her gifts, she got many beautiful things from her friends and she was so thankful.

''I think that was it. Thanks so much for all of your gifts!'' Lexie said after she had opened the last gift on the table.

''No there's one more thing.'' Mark said. He was standing right next to her and he looked at her and started talking

''Lexie. We have been through a lot over the years. We've made mistakes both of us, but I'm glad because maybe we wouldn't have been where we are today without them. But there's one thing I know for sure and that is that I have never stopped loving you, not when we fought, not when we broke up and not when you moved to Boston. My top five nights in my life are the night Callie told me that she was pregnant with Sofia, the night you told me that we had a son together, the night you came here and moved in with me, a special night with you that I don't want everyone here to know about'' Mark stopped talking for a while because everyone laughed so much, typical Mark to talk about sex ''and probably tonight. I love you and I want to spend the rest of my life with you.'' He changed position from standing up to standing on one knee.

''Alexandra Caroline Grey, will you marry me?'' he said and picked up the ring.

''Yes, yes, of course I will!'' Lexie answered and kissed him. They were so happy and focused on each other that they didn't even notice how everyone in the room clapped their hands and shouted ''yay'' and ''congratulations''. ''I love you so much.'' Lexie whispered to Mark before she went to hug Meredith who was standing next to her.

''You totally knew.'' Lexie said as she hugged her sister.

''Of course I did.'' Meredith answered. ''This feels right, I hope?''

''I have never been happier, Meredith.'' She said honestly.

''I believe you.'' Meredith answered and Lexie walked away and hugged and talked to everyone else. An hour later everyone had left except for Mark, Lexie and of course Meredith and Derek.

''Our kids have already fallen asleep, huh?'' Lexie said to Mark.

''Yes, hours ago.'' Mark answered. ''But they're sleeping here tonight, that's planned since days ago.''

''Great. So we can go home alone now?''

''That's the plan.'' Mark said.

''Thanks for taking them over the night.'' Lexie said to Meredith and Derek.

''It's okay, you know that we and our kids loves having them over.'' Derek answered.

''Yes. But we'll come as soon as we can tomorrow.'' Mark answered.

''No need to hurry. We know how the night right after getting engaged is.'' Meredith said and laughed at her memories from the same night.

''Oh, that sounds like something my old friend Meredith the dirty mistress would say,'' Mark said and high fived Meredith.

''Those were the days.'' Meredith said.

''What are you even talking about?'' Lexie said.

''Just an old phase in my life that I'm over now.'' Mark said.

''If you say so.'' Lexie said ''Come on, let's go.''

''Bye. And thanks for everything!'' Mark said and he and Lexie drove home and continued their night which contained only two hours of sleeping and many hours of other adult activities.

Lexie woke up early the next morning and started to smile as soon as she saw the ring on her finger, she was getting married to the love of her life.

''Good morning, babe.'' She said and kissed Mark all over is face until he woke up.

''That's a way that I like to wake up.'' Mark said and kissed her on her lips.

''We are getting married.'' Lexie said and showed him the ring.

''Yes, we are getting married.'' He said and smiled. ''Do you want to have a big wedding?''

''No. I just want it to be our families and friends and I don't want a church or something. Maybe just something beautiful somewhere on Derek's land?'' She said.

''That sounds perfect.'' He answered, he didn't really care so much he only wanted her to be happy.

''I know. And I want it to be soon.'' She said.

''Yeah that'd be great. But you know that we only have one free weekend the next two months and that's next weekend.''

''Then we have to get started.'' She said.

''Okay, let's drive to Meredith and Derek and pick up the kids and talk to them right now.''

They arrived to their house thirty minutes later after taking a quick shower and eating some breakfast.

''You're here early even though I said that you didn't have to.'' Meredith said when she opened the door.

''Yes, because we're planning to stay here for a while and plan my wedding.'' Lexie said.

''You have to plan your wedding the day after you got engaged?'' Meredith said and looked at her sister.

''That's right, because we're planning on getting married next weekend.''

''You are what?!'' Meredith said chocked.

''Yes. We wanted to ask if we could get married here on Derek's land. We just want something small for our friends and family.'' Mark said.

''Well that sounds great to me.'' Meredith said.

''I also wanted to ask you if you wanted to be my maid of honor.'' Lexie asked.

''You want me to be your maid of honor?'' Meredith asked chocked. She hadn't been very close to Lexie before she moved to Boston. Lexie had been way more close to her other sisters.

''Of course.'' Lexie asked ''is there a problem?'' she added when Meredith didn't answer.

''No, it's perfect. Of course I'll be your maid of honor.''

While Lexie was talking to Meredith about the wedding Mark decided to tell his kids about it.

''George and Sofia, daddy needs to tell you something.'' Mark said and his kids came running to him.

''What daddy?'' Sofia asked.

''Do you remember that movie we watched last week with the man and woman who was in a church and the woman had a white pretty dress?''

''Yes! And car!'' George said.

''Yes, they had a car.'' Mark said ''When you're in a church like that it's called a wedding. Lexie and I are going to have a wedding next week. And Sofia you are going to have a pretty, pretty dress and George is going to wear a beautiful costume. Does that sound good?''

''Yes. Lexie white dress?'' Sofia asked and Mark laughed at how she lost a few words in her sentence.

''Lexie is going to have a white dress.'' Mark said.

''Yay!'' Sofia said and then she ran away with George after her.

Mark walked into the kitchen where Lexie and Meredith was looking at dresses on a laptop.

''Hi. I told the kids about the wedding.'' Mark said and hugged Lexie from behind.

''What did they say?'' Lexie asked and kept looking at the screen.

''Sofia was excited for the dresses and George talked about the car in the movie we watched last week.''

''Sounds like something he would say.'' Lexie said.

''I know.''

''THAT ONE!'' Lexie shouted out of nowhere.

''That one?'' Meredith said and pointed at the dress in the right corner.

''Mark, go away. You can't see the dress before the wedding.'' Lexie said and looked at him.

''Seriously?'' he asked.

''Seriously!'' she said and he walked away.

''Yes that light blue one.'' She said when Mark wasn't there anymore

''It's perfect.'' Meredith replied.

Lexie, Mark and most of their friends spent all their free time helping with the wedding the following week. They bought dresses, sent invitations, bought food, and decorated the place of the wedding and much more. When Saturday finally arrived Richard had arranged so Lexie, Mark, Meredith and Callie didn't have to work while everyone else had a surgery or two that day but everyone in the group of friends would be able to leave for at least an hour during the wedding ceremony. Lexie had slept at Meredith's place that night so she and Meredith could start with the last things that had to be done as early as possible. Lexie, Meredith and Zola went to pick up the dresses for Meredith, Lexie, Zola, Charlotte and Sofia as soon as the store opened and when they arrived to the house again both Mark and Callie was there. Mark was there to take care of the kids and Callie was going to cook while Meredith, Lexie and their sister Molly was going to fix their hairs, make up and clothes. Since they wanted something small and friendly they decided that they wanted Miranda Bailey as their priest, she had done it for Callie and Arizona just a few years ago and she was glad to help again. But they also wanted something traditional so they didn't see each other that day except for only a few minutes in the morning.

A few hours later all of the guests had taken their seats on the benches in front of the small altar which was decorated with beautiful flowers in colors that matched with the brides and bridesmaid's dresses. Mark and his best man Derek was standing on the left side of altar and Meredith on the right and waited for Lexie to come. Mark was just whispering to Derek that he should go and check on her when he saw his two children walking hand in hand on the aisle to the altar, they were holding hands and they had a bouquet of flowers each and just a few seconds later he saw Lexie and Thatcher coming. Lexie had a light blue long dress and she was the most beautiful bride he had ever seen. Sofia and George had arrived to the altar and was standing next to Meredith. Thatcher kissed Lexie on the cheek and said ''I love you.'' and she was now standing in front of Mark.

Bailey said the classic wedding speech and then she asked if they had any vows.

''No we don't.'' Mark said.

''But I want to say something.'' Lexie said.

''Go for it.'' Bailey said.

''Ever since I was a kid I've dreamt about my wedding. I wanted it to be a big, big wedding and I wanted to have an expensive dress and I wanted to ride into the church on a horse and everything. But is that the wedding I'm having right now? No it's not. And am I happy with this wedding? Yes I am happier than ever before. And how is that possible when I have dreamt about another wedding my whole life and now I'm having the opposite to my dream wedding and I'm still happy and that is because I've found the right man. And when I am with you nothing else matters. Because you are the one for me Mark Sloan and I want to spend the rest of my life with you.'' Lexie said with tears in her eyes and the crowd clapped their hands.

''Alexandra Caroline Grey, do you take Mark Everett Sloan, to be your lawfully wedded husband, and do you promise to love, honor and respect him, and comfort him, and keep him in sickness and in health for so long as you both shall live?''

''I do.''

''Mark Everett Sloan, do you take this woman, Alexandra Caroline Grey, to be your lawfully wedded wife, and do you promise to love, honor, respect her, and comfort her, and keep her in sickness and in health for so long as you both shall live?''

''I do.'' Mark said.

''The rings.'' Bailey said and Derek came with the box.

''Your wedding rings are symbolic of your commitment to each other and your endless love for each other.'' Derek said and then Mark and Lexie put the rings on each other's fingers.

''I now pronounce you wife and husband. You may now kiss the bride!'' They kissed for the first time as husband and wife and the crowd cheered and applauded.

And in that moment Mark knew that Lexie was the one he wanted to spend the rest of his life with and so they did. Only a few months after the wedding they moved into a house together and on their first year anniversary Lexie found out that she was pregnant again and about nine months later she gave birth to a beautiful girl named Clara. And they lived happily ever with their beautiful family. Until a late October night when Lexie died in Mark's arms at old age and he died just a year after, but he didn't complain he had spent most of his life with his wife and he couldn't imagine a better life for himself.

The end.

That was it, the last chapter of Beautiful Disaster. I am sure that I could've made the story longer but I have other stories that I want to continue and I had no inspiration for this story. This is the happy ending that Mark and Lexie deserved. But I want to thank all of you who have read the story ever since I started it. Much love to you and I would love to know what you thought about the story/the end. Thank you. – Amanda.