No, a Housekeeper he certainly was not. It wasn't his finest of plans, the building of the link mentally exhausting and unnatural to both of them, requiring so many alterations. But if he hadn't reached out to it, soothed and tamed it, the House would have destroyed him just as it was itching to destroy the Doctor. Perhaps the Master wasn't the natural choice-- but he had been its only choice. And he preferred keeping it that way. His eyes narrowed, instantly suspicious of the Doctor's line of questioning.

"Might I remind you, Doctor, that without me, you won't make it out of here alive?"