His arms are warm around her, hands settled over hers on her stomach.

She's very aware of that.

"I don't know either."

Kate closes her eyes after a moment, feels his chest rise and fall and listens to his heart beat in it.

"There's still the phasing problem. We'd have to make sure I couldn't, if we don't want to risk miscarriage."

There is always something clinical in the way she says that.

She doesn't know how else to say it.