"Flirtatious?" Caitlyn guessed and shrugs. "As I tell everyone, I am not interested in dating right now. Besides I figure Jack could use some competition. And I'm not all that frightened of what he might ask for. Who knows, he just might surprise everyone with something small." Caitlyn said willing to go for at least something. "Besides I'm certain without his help you would have continued to get worse. And I don't want Rose losing you again. That had been hard enough to get at least somewhat over you the first time. So owing him a favor is the least I can do to say thank you." Rose giggles a bit at what Jack said and looked at him.
"Left you behind. I don't understand." Rose admits looking to the two of them for a bit of clarification.
"It's when you took a bit of the TARDIS' soul when you opened her up with Mickey's help. After taking it from you, the Doctor had to get you home so I'm guessing had accidentally left Jack behind not realizing what he had done." Caitlyn said as she sat down theorizing, from what Rose had said of her adventures.