Donna woke slowly, and found herself still wrapped in the Doctor's arms, her head resting against his chest. She blinked and pulled back to see whether he was awake, and found him smiling at her. She smiled back, wondering how long she had been asleep. She felt much better than she had, but still tired.
"Feeling better?" He asked, reaching up to push a lock of hair behind her ear.
"Mm-hmm," she answered, sleepily. "What's for breakfast?"
He laughed. "Hungry, are you?" He pressed a kiss to her forehead.
"Mm-hmm," she repeated, closing her eyes to lean into him.
"I've been thinking," he said.
"Oh dear. About what?" Donna asked.
"I think we should have a baby."
Her eyes flew open. "I think I must still have a fever. I could have sworn you said we should have a baby."
"Nope, no fever. That's what I said. We should have a baby."
Donna rolled onto her back, looking at the ceiling. He kept his arm over her. "What are you thinking?" he asked, finally.
"I'm wondering what brought this on."
"Well, just everything. We're neither of us getting any younger--"
"Slow down on the charm, there, spaceman. I'm supposed to be the one with the biological clock ticking, you know."
"I just meant, if we were going to, now would be the best time."
"How do you know it's even possible? We're not even the same species," she said.
"It's possible. Our biologies are close enough to make it possible."
"It's happened before?" she asked.
"Not me personally, but yes. It has happened."
She was silent for a moment. Ever since the library she had been thinking about having children, being a mother. But she thought this life, travelling with the Doctor, made that impossible. "You know, we haven't exactly been careful. You might have mentioned the possibility sooner."
"I wasn't trying to secretly impregnate you, if that's what you mean. I took precautions," he said, with a smile. "So, what do you think? I think you would make a great mother. I would be honoured to raise a family with you."
"It would change so much." She rolled over to face him again. "I mean, we'd have to be more careful about where we travel."
He nodded. "Yes, it would change things. I think it would change things for the better, don't you?"
She closed her eyes, picturing a perfect little boy with his hair and her freckles. "Yes."
"Donna Noble, I love you," he said, pulling her into a hug.
Her voice was muffled against him. "Now I know I'm still delirious." She put her hands on his chest, pushing back to look at him. "Oh, no, don't tell me--you're going to want to get married now, aren't you?"
He ruffled his hair with his hand, "Welllllll..."
"You do want to! I should have known."
"Don't you want to?" he asked, pouting a little.
"Well," she said, then stopped. He was looking at her with those puppy-dog eyes that she couldn't resist. "I don't want a big wedding, but maybe a little private ceremony somewhere--" she was interrupted by him kissing her enthusiastically.
He broke the kiss, "Fine with me! Now that's settled, maybe we should get started on the baby?" He waggled his eyebrows at her, moving his hand to cover her breast.
She laughed. "How about breakfast first?"
He shook his head. "Breakfast can wait," he said, kissing her again. She laced her fingers behind his neck. Breakfast could wait.