All Ruby could think of was this: Thank God Sarah survived. It was a long birth, and Ruby couldn't bear hearing her girlfriend screaming in agony. After the deliveries of Sandra and Beth, and the two women grew older, neither of them thought they would have a family.

But it happened. "Twins," the midwife says. "A boy and a girl."
"What about Sarah? Is she safe?"
"She will live. However, she's rather old for having children, many said it wouldn't be possible. Do you know who the father is?" Ruby stay silent. How the hell could she explain to the midwife that she's the father- second mother- whatever the term should be.
"Can I see her?" The midwife lets her through so she can see Sarah.

Sitting on her bed is the proud mother, a baby in each arm. Ruby sits beside her, smiling. "You did well, darling."
"You stayed?"
"Of course I did, I promised, didn't I?" Sarah nods as they watch the twins. The midwife looks nervous. "What is it?"

"The girl is a lot stronger than the boy," she explains. "Due to how weak the boy is, it's unlikely he's live past the day." Sarah and Ruby glance at each other, worried.
"But he must," Sarah whispers. "Emma needs her twin."
"She wouldn't even know that she misses him," the midwife tells them, gently. "I'm sorry." She leaves the room, leaving the parents to contemplate on what they can do.

"I thought it would be nice to have twins after what happened," Sarah says. "But…"
"I think I can do something about that. I can check to see which half of Luke is weaker, but it might mean that the twins will have to transfer their human and Qetesh halves."
"What?"
"Shh, I've done this before." Ruby puts her ear to Luke's chest, listening to his stammering heart. "Luke's human half is weaker. If he ever gets his hunger while in this state, he will immediately die. That could happen at any point. If I transfer a quatre of his Qetesh genes to Emma and pass her redundant human genes to Luke, both of them will live. You want your son to live?" Sarah nods. "Then place your trust with me." She places both Luke and Emma on the other side of the bed. Ruby closes her eyes and places a hand on each child.

Immediately, Luke seems to be full of life. He reaches out for his twin sister, who takes his hand. "There, they're both healthy."
"Thank you," Sarah holds Ruby's hand.
"We'll be all right."

"We haven't thought which name they will take," Sarah realises when Christmas Day 1999 draws to a close. Luke and Emma are both dressed in newborn clothes. Sarah tried to put Emma in a dress, but Emma kept screaming at the top of her lungs, meaning they did away with it altogether. Now, both of them are asleep on a mattress on the floor, with K-9 watching over them.
"I guess we were so worried about you and the children surviving the birth that we never thought about it. They should take your name."
"No, they should take yours."
"Luke and Emma Smith sound better than Luke and Emma White."

"Smith-White," two voices chorus.
"What?" Sarah asks, glancing around.
"Down here," K-9 says. "The twins spoke their first words."
"Should they be developing that quickly?"
"Negative. Luke and Emma are developing fast due to their genetic transference."

"Well, what did they say?" Ruby asks as she and Sarah kneel down. Sarah has a camera in her hands so she can film the twins. Luke and Emma look straight into the camera.

"Smith-White," they repeat.
"Smith-White?" Ruby asks. "K-9, is it normal for twins to do this?"
"Negative. Due to their genetic transference, Mistress Emma and Master Luke can, for the time being, read each other's minds."

"Luke Smith-White," Luke points at himself, then looks at his sister. "Emma Smith-White."
"Should we do this?" Sarah asks, worried. "If word gets out about our relationship, the fact we had children together- UNIT could try and take them away for experimentation." Ruby shakes her head, going to the phone.
"I'm going to call the Brigadier. He'll protect them if it comes to that."

The twins start laughing, waving at each other as Sarah continues filming them. A soft smile plays on her face as she watches them. "Mummy." They say. At that point, Sarah puts the camera down. The twins stare at her intently. Placing a hand over her mouth, Sarah stifles a sob. She thought no one would call her 'Mummy' again. Ruby walks back through.
"I've sorted out everything, and- Sarah!" Ruby pulls her girlfriend into a hug. "What's the matter?"
"They called me 'Mummy'." Sarah sobs. "I never thought I would be called that again."
"Luke and Emma Smith-White certainly are our miracle babies."

As they look out the window, snow begins falling. Slowly standing up, gaining her balance, Emma totters over to the window. After a few minutes, Luke join her as they stare out of the window. Sarah and Ruby pick them up, and the twins settle in their arms. Ruby turns to her girlfriend. "Merry Christmas, Sarah Jane."
"Merry Christmas, Ruby." The family of four watch the snowflakes falling, feeling a sense of peace, believing that the moment will last forever.