The Immortal wasn't expecting his lover to snuggle up to him so quickly when they had started recently going back out. But he said nothing for the Doctor was feeling rather sick. "I am sure that feel sick. I wasn't able to find what got you this way." Jack told him. However he brought the Doctor close to him and let the Doctor be as close as he wished. Hearing his question, Jack buried his face in the Doctor's hair. "I did. They match. She is your sister." He took a pause before continuing. "Arwen doesnt know yet. She's wondering through the TARDIS before I could tell her."