How did the final episode of King of Queens end?!

How did the final episode of King of Queens end?

The King of Queens ended its 9 season run on May 14, 2007 with a one-hour series finale. Doug is stunned to learn Carrie didn't give up her apartment like she promised so they could start over. At Arthur's wedding, Doug makes it official that they are through. Doug and Carrie, who were going to adopt a Chinese girl, Ming-Mei, together, each rush home from the wedding to get their passports, seeing who can get to the child first. Carrie gets home first and hides Doug's passport, so it looks like Carrie wins. However, on the plane, Carrie reclines her seat and finds that Doug is sitting behind her; Deacon had found his passport. On the plane, Doug and Carrie make-up and once again decide to adopt the Asian girl together. Carrie later finds out she is pregnant, meaning that they now have two children, their adopted child and their biological child.

As for Arthur, at the beginning of the episode he is planning to marry Ava St. Clair. At the wedding, Carrie finds out that she is only marrying Arthur because she thinks he is gay from all the flamboyant things he does. Realizing the truth about Arthur, Ava leaves. When Arthur finds out, he makes a last minute change and decides to get married to Veronica Olchin, who has always had a crush on him. One year later, in the final scene, Doug and Carrie are taking care of their children when Arthur walks in their house with a suitcase exclaiming, "It didn't work out!" After clips from the past nine years, it fades to black with the words "Thanks For The Ride" written on the screen in cursive. The song playing while the clips were rolling is "Milk & Honey" by Million Billion.