Disclaimer: Still not mine. Pity…
It was almost a year since the Master took power. Kailyn, in conjunction with the Doctor, Jack and the Jones', arranged the ill fated attempt to wrest that power from him, but the consequence of their failure was entirely shouldered by the Doctor. She turned away while he writhed on the floor. She could hear his silent screams in her head, as she channelling them away so the Master wouldn't know by how much he had triumphed.
She was the one ordered to cage him, like a curiosity to be viewed and gloated over. She apologised several times when she brought the cage, but the Doctor just stepped inside and sat down quietly, pensive.
She looked at him every so often throughout the day, just to check that he was okay, but she started to feel that she wasn't helping much. The next morning she sat in the TARDIS instead of visiting the Doctor, and she told her about the failure and how she felt like it was her fault. The TARDIS told her gently to stop moaning and wait just a little longer.
This 'longer' turned out to only be a few hours. At the thoughts and cries from the planet below, the Doctor was renewed. The paradox was reversed by the efforts of Jack's gun and the TARDIS' consciousness. The world was restored and the Master was no more. Dead at the hand of Lucy Saxon.
Together, the Doctor, Jack, Martha and Kailyn removed the paradox machine from the TARDIS console and dismantled it, storing individual parts away 'just in case' they could be of use in another way.
After delivering the Jones' back to London, Kailyn volunteered herself as cook for a celebratory meal. The Doctor was quiet as the others shared stories of home and family, but eventually he was persuaded to join in after Jack asked him to recount their first encounter.
Kailyn was offered one of the TARDIS' spare rooms that night, where she slept for a straight thirty-six hours - heaven after years of sleepless nights and bad dreams. The TARDIS made sure that she was uninterrupted and was resolved to let nothing disturb her.
After failing to rouse her in the morning, the others went their separate ways. Both Jack and Martha wrote notes for Kailyn, thanking her for her message carrying and for keeping the Doctor sane during 'that year'. They said their goodbyes in Cardiff and London, and the Doctor was left alone. But not for long.
His encounter with his fifth self and Christmas aboard the Titanic went totally unknown to the occupant of bedroom sixteen. He almost forgot that she existed.
Until, at last, she wandered into the control room, a small body in pyjamas with a mass of black and blonde frizz, desperate for some food.
Sorry it took so long!
This was for JustABlackRose, because you reviewed. Thanks.
The next chapter might be the last, but a sequel is on its way.