Jack was following her around "I still don't think the TARDIS likes me, " He laughed. He eventaully found Rose and The Doctor. He seemed so amused "Aww isn't that sweet." He chuckled a bit.
He was happy the Doctor and Rose were so happy together.
The Doctor looked and Jack and Cat "mmm," he gets his sonic screwdriver and begans to check them over to see if they are themselves. He didn't think they were being normal.