"River, dance with me," the Doctor commanded. The young girl looked up at him questioningly.

"Why do we have to dance?" She asked haughtily, ignoring the grin that was creeping on her face as the bickering began again.

"Because there are aliens all around us," the Doctor told her solemnly and River looked around in alarm. The Doctor turned her face back to his with his hand. "And if we don't blend in we will be caught and killed. This is a party, and plenty of people are dancing. We'll blend better inside the crowd of dancers." River nodded, the blood pounding in her veins, as he led her onto the dance floor.

They twirled quietly for a few minutes. Then a smirk appeared on River's face. "You know, you're moving rather fast," she told him, the smirk still dominant on her face.

The Doctor's eyebrows pulled together in confusion. "What are you talking about? We're moving to the beat-"

"I mean this," she said, pointing at him, then at herself. He still looked confused. "This is only the second time I've gone on an adventure with you and the Tardis and we're already dancing. That's pretty fast for a second date."

"Who says it's a date?" The Doctor said, smiling now.

"You did, when you kissed my hand," she replied. When the Doctor had come to pick her up an hour earlier, he'd demanded that she dress in the fanciest dress she could find. When she was finally ready, the Doctor had looked stunned and awed by her, and when they were close together on her doorstep, he'd kissed her hand and said, "River Song, I will be the happiest man on Earth if you would be so kind as to accompany me tonight," and River had replied, "You're not a man," and wrapped her arm around his. He'd led her to the Tardis, and away they went.

The Doctor's smile grew wider. "Well then, River Song, I suppose it is. But this isn't my second adventure. I don't even know what number it is for me. So in a way, we are moving much too slow," he replied, dipping her low to the floor with his last words. When she swung back up, she patted his cheek.

"You and your vague mentioning," she scolded, tutting softly. "When are you ever going to explain this 'time stream' thing?"

The Doctor grinned. "It's more fun this way. Don't worry, you do the same thing to me."

"So which one of us did it to the other first?" River asked, raising one eyebrow smoothly.

"It's a chicken or the egg thing, I suppose," the Doctor replied, dipping her again.

"So what now?" River asked as the silence stretched.

The Doctor glanced around, then looked into her eyes. They seemed locked there for a few moments as he studied their dark depths. Then he asked, "River, do you trust me?"

She stared at him for a moment. Then, without hesitation, she replied, "Yes, though I know I shouldn't." She flashed a grim smile. She didn't like the sound of this.

"Then spin."

"What?"

"Spin, River, when I tell you to. Spin out, and then duck." The Doctor stared into her eyes. "Will you do that?"

"You mean you don't already know? You already know me remember?"

He shook his head. "I don't know the River Song on her second visit with me. The older River would do it without hesitation. But you I don't know." She smiled to herself as she spotted the flash of irritation on his features. She nodded and smiled reassuringly. He didn't seem to be reassured. She must be a naughty girl in the future.

"Now!" The Doctor shouted.

River didn't hesitate. She spun.