Hard to place trust perhaps, but the funny thing was, Jack didn't see this as running away. Not completely, anyway. He knew how Torchwood could retain a leash, pulling you back in when you thought you'd run far enough away. Jack knew he could never completely run away from the place but he could let others go. Sure, by all rights Ianto should have been retcon'd, but what would the good be in that? Absolutely none, was the answer.
Jack didn't feel guilty over what had happened with Rose, they had travelled together and there was a bond that formed between the Doctor and his companions. Jack knew Ianto understood, though how he had wound up with a man that could understand Jack's tendencies was beyond him entirely.
"That and I get more coffee," Jack replied, returning the impish smile. And the thought of a shag in the back room wasn't the worst thing in the world either. "Let me know what you need, monetarily wise," Jack said. "I'll have the funds wired here." He quickly fixed him with a level stare. "And don't you get any notions about thinking I want you to pay me back either," Jack added. "There will be none of that, partner." Partner: in more ways than one.