Sara invites her ex-husbands and their new families to celebrate Christmas with her and her husband Janne. Sara has always wanted to have a baby with Janne, and at the dinner table she reveals the news: she's pregnant. The only problem is that Janne had a vasectomy two years ago, without Sara knowing it. The secret starts to spread among the guests, and in no time everyone knows but Sara. The party heads for a complete disaster. Who's the real father?

From casting to the final scene, this special shows how the cast and crew of "Young Royals" brought Wilhelm and Simon's heartwarming journey to life.