Jack listened for he still to this day never liked the Doctor upset. But he would do his best to make sure that he was calm and happy again. "I know what to look for but you will need to take some blood from yourself to pair them together. Sadly I dont know anyone who can. I'm sure the TARDIS can help, can't she?" He asked curiously. "But you know if you both are sibling, you will need to tell her. Give her something to remember."
There was a knock on the glass. On the other side of the closed glass door, Arwen was there with a tray and three mugs. She looked concerned, yet her eyes showed sadness and worry.