He gives her a small smile. "Didn't really get to talk last time, what with all the universe-saving and TARDIS-piloting to do, hmmm?"
The coffee is super important, of course, but this is as well. He knows Ianto won't leave them out of getting some coffee, and it'll be up to Ianto if he wants to sit in with them or listen to the Doctors. Between the three of them, Jack wouldn't be surprised if things turned into some big science discussion instead of the Doctors going at each other.
"Oh, Martha's fantastic! Love her like crazy. We've even worked together a few times, her and the team. Mickey actually helped me out some months back with a job checking out a publisher. It's been awhile since I heard from him, but I'm sure he's doing well." Obviously things hadn't worked out for him and Rose, but Mickey was in her life for such a long time; he's sure she still cares about how he's doing.
He laughs and puts the arm around her. "Of course there isn't! I'm more than enough for all the universes!" Something in her tone and expression... He sobers some and looks over to her Doctor, then back to her. "Did he tell you...?"