Sinister tilted his head to the side, the holograms rising quickly into the ceiling, plunging the room into sudden darkness. One that both Sinister and Gambit could see just fine, as their eyes were made to work better in the dark. The metal cables that had formed the secondary throne spun away, pulling it apart until only Sinister's remained.
He sat there, back now straight and hands cupping the ends of the armrests. Presenting himself in manner that would be unconsciously intimidating to most members of the human species. His tone when he spoke was neutral, "If you were to refuse, you would be breaking your oath. Discarding the last vistages of that honor you cling to so deeply. If you no longer have your word, you would have nothing. No reason for anyone to ever trust you again. No reason for me to believe you worthy of the freedoms I have granted you within my domain. No reason for me to not take you and put you under my knife once more. No reason for me to continue desiring you as my son and potential heir."
He sighed, voice still neutral but containing a hint of wistful regret, "And I have so come to enjoy your company as a near equal. But if you were to refuse..." He shrugged in the darkness, a slow rise of his shoulders followed by his hands lifting and turning palm up.