On Mina and Derek's twenty-first birthday, they were staying at her family's castle. It had become a tradition since the previous year. Mina noticed that Derek was acting strange during their whole visit, and that he now seemed anxious about something. She wondered if she should ask him what was wrong.

"Why are Diana and Apollo taking so long?" Teddy whined suddenly, snapping Mina out of her thoughts. "I want to go trick or treating!"

"They'll be here soon, honey." Angel smiled at her son. "They just went home to change into their costumes. Speaking of which, it's time to put yours on."

"Come on, Ted, I'll help you." Rocky took Teddy by the hand and they walked to the elevator.

"What's Teddy going to be this year?" Janet asked Tim and Angel. "I haven't seen his costume."

"I don't know, Mom." Tim smiled. "Rocky took him to buy his costume, but they've both been secretive about it."

Angel glanced at Columbia. "Do you know anything about it, Mom?"

"Not a thing." Columbia shrugged. "Neither of them told me anything. Oh, well, we'll see it soon enough!"

Derek, who was alternating between looking at his watch and staring out the window, let out a sigh. "Where are they?" He stepped away from the window and sat down beside Mina.

"Honey, what's going on?" Mina asked. "You're acting as though you haven't seen Xander and Zondra in ages. They were here earlier, remember?"

"I know, but..." Derek stopped when he heard the doorbell. He lept out of his seat and raced to the door, nearly knocking Frank down in the process.

Frank raised an eyebrow and looked at Mina. "What's the matter with him?"

"I don't know, Dad." Mina shook her head. "Are you okay?"

"I'm fine." Frank smiled.

Xander and Zondra walked into the castle after Derek let them in, with the twins and Tricia. Diana and Apollo were disguised as Raggedy Ann and Andy, and Tricia was a gypsy.

Derek pulled Xander aside while everyone was admiring the costumes. "Did you bring them?"

"Of course we did!" Xander replied. "I'll help you set them up if you want."

"Thanks." Derek grinned.

"Just relax." Xander clapped Derek on the back. "I'm sure she'll love it."

Rocky and Teddy came back downstairs just then. Teddy was dressed as Elvis, with a white jumpsuit with sequins on it, a red scarf and a black sideburned wig.

"You're so cute!" Columbia squealed, running over and hugging Teddy.

"This was your Grandpa Rocky's idea, wasn't it?" Janet grinned.

After everybody had had a chance to compliment Teddy on his costume, Rocky knelt down beside him. "Ready, Teddy?" He started snapping his fingers.

Teddy started singing "Teddy Bear", dancing like Elvis. After his performance, he bowed as everyone applauded.

"Well, I guess we can go!" Tim grinned.

"Wait, where's KO?" Tricia asked, looking around. "Isn't he going with us?"

"I'm right here." KO said, coming down the stairs. He was wearing jeans and a T-shirt.

"Honey, where's your costume?" Columbia walked over to him. "I thought you promised Teddy that you would go trick or treating with him."

"Mom, costumes are for babies." KO rolled his eyes. "I have a mask, see?" He put on his zombie mask.

"Okay." Columbia sighed. "It's up to you."

"Can we go now?" Diana pleaded, tugging on Xander's shirt.

"Just a minute." Derek opened the door. "Before you all go, I just want to, uh..." He glanced nervously in Mina's direction.

"Okay, I'll come and help you put them where you want them." Xander followed Derek out the door, causing everybody in the room except Zondra to ask what was happening.

Mina looked at Zondra. "What are they up to?"

"Where did Daddy go?" Apollo asked.

"You'll see!" Zondra answered both of them, a huge grin on her face.

Finally, the two men returned. Smiling, Derek walked over to Mina and kissed her. Pulling a blindfold out of his pocket, he put it over her eyes before she had a chance to say anything.

"Derek, what are you doing?" Mina gasped, fumbling around blindly for him.

Derek took Mina's arm and started guiding her out the door. "I have a surprise for you." Turning around to face the others, he smiled. "You can come too. Just don't say anything until Mina sees it, okay?" They all walked out the door, and headed over to the fountain.

Still blindfolded, Mina heard everyone gasp in surprise. "What is it?"

"Okay, you can look now!" Derek took Mina's blindfold off.

Mina's eyes went wide with shock when she saw what Derek had done. There were three pumpkins lined up in front of the fountain, each with words carved into them. The first one said "MINA", the second said "WILL YOU" and the third one said "MARRY ME?" She grinned at Derek. "Is this what you were working on yesterday, when I didn't see you for a couple of hours?"

Derek nodded, smiling. "I went and bought the pumpkins, then carved them next door so you wouldn't see them until tonight."

"Oh, Derek!" Mina threw her arms around him. "Yes! I'll marry you!"

Janet rushed forward and hugged Mina, sobbing. "My baby's getting married!"

Frank smiled at Derek. "Welcome to our family. I mean, we already considered you a part of the family, but now it'll be official." He then pulled Mina into a big hug.

Once everyone had congratulated Mina and Derek, Tim spoke up. "Okay, now we'll get going." He started walking off with those who were going trick or treating.

"Wait." Teddy let go of Angel's hand and walked back over to where Mina and Derek were sitting on the edge of the fountain. "Don't be sad, Aunt Mina. It'll be okay."

"I'm not sad, honey." Mina smiled at Teddy, tears streaming down her face. "I'm just crying because I'm so happy."

"Oh." Teddy said. He shook his head. "Grownups are weird sometimes."

Chuckling, Derek grinned at him. "What do you think of all this, Teddy? Would you like me to be your uncle?"

"Yeah!" Teddy exclaimed. After hugging them both and saying goodbye, he ran back to his parents.

"Well, we'll leave you two lovebirds alone." Columbia smiled. She walked back into the castle with Rocky, Janet and Frank.

Mina put her head on Derek's shoulder. "You know what? This has been the best birthday ever!"

"I agree." Derek kissed her. "And we'll have many more to celebrate together."

"You know what would make this day even more wonderful?" Mina winked at Derek.

Derek grinned. "I know exactly what you're talking about." They stood up and went back into the castle.