It's all AU.

After he'd found the Doctor's Ninth regeneration and punched his lights out Jack felt better. After curling up on that TARDIS, with that Doctor, and without sex and romance and complications, Jack felt better equipped to deal. So, he grabbed his coat, stopped by the hotel lobby for a cup of coffee and a muffin, and headed toward the TARDIS with the new Master.

He let himself in just as he finished his impromptu breakfast, and immediately set his cup down. "Morning," he said, as carefully casual as he could manage.

Rose sat down by the lake, head resting on her crossed arms braced on top on her knees. When she heard footsteps she said without looking up, "'M probably not good company right now."