[Because going back on his word would also be terrible. Not to mention they've already decided on Rembrandt and they've already made a change in today's schedule; Sebastian doesn't fancy more.]
--Very well, then. [YOU WIN. The things he does for the sake of your education.]
But please keep in mind this will mean I will be unable to oversee your progress the same way I normally would. [He could get creative with mirrors, but nah. You live with your choices, young master.]
Should you make an irreparable technical error I will have you start over from the beginning.