The Doctor's two hearts pounded as if they would burst. He set his hands on the TARDIS console to steady himself. His breath was frozen in his chest. The Doctor swept his hair off of his face. His eyes stared wide, seeing nothing but flashes of color and terror.
"This is...impossible. This is scientifically improbable, not even suggestible, nada, zip." His eyes darted upward, across the room to the young woman on the other side of the console. Rose Tyler's blonde hair clung to her face. One hand reached involuntarily to her stomach.
Rose shook her head. "But Doctor, the scan obviously just told you it is possible!" She was beginning to feel hysterical.
"I don't understand, Doctor, you said that because you are a Time Lord and a completely different species, you couldn't...we wouldn't need-" Rose clutched her head in the hand that was not holding her stomach. She cast her eyes into the Doctor's. He was a bloody alien! He had two hearts and was over 900 years old! Although he looked quite young, there was no way he could impregnate a human. But he had just found his young lover with child.
The Doctor rushed forward, taking Rose's hands in both of his. "Rose Tyler, I apologize. I-I...I should have run more tests before we..." He smiled weakly, and she returned his smile with one of her own, although tears had begun to well up in her eyes.
"Oh no, please don't cry." The Doctor shook his head. "You know I'll...blimey...I'll provide for you, for us. I will do whatever it takes to ensure your safety and-" He cut off again as he looked to Rose's stomach. She followed his gaze.
"Yeah, I reckon you will." She gave a nervous laugh. "We have the TARDIS, all of time and space to help us raise a child."
The Doctor and Rose stood silently, there in the control room, letting the enormity of the situation wash over them gently. It began to dawn on them that they would have a proper little family, something the Time Lord from Gallifrey had never imagined he would have.
Slowly, the two weaved a new life together with one extra thread.