It's all AU.

More sleep, on Jamie's insistence, dinner with the Doctor and Rose, having all in one TARDIS - the Master felt a bit more centered.

This was, he admitted to himself as he wandered towards the library, possibly because the number of people here he counted as family here was larger then back home.

Speaking of. There was a young and mortal version of Jack, walking the other way. The Master stared more than was really polite.

Jack was walking into the console room for the interior of the TARDIS, sonic screwdriver in hand and headed straight for the console. When the door opened and Rose walked in he made an unattractive, startled sound and stared for a second. "...Rose."