It would be most enjoyable if they served...of their own free will...and that would happen...if they believed they had really always been part of her sisterhood had always been loyal f rom the start...
First off....they must believe they had found no hope in the idea of peace with homo sapiens...not just the Sentinels, Bastion...but...everywhere...and the one that taught them to respond....taught them to move...to fight....
The X Xavier symbol fades in their minds to become W Wyndham...in their minds Mastermind changes from the rather Weedy figure he was to the firm solid illusion he created most often and used to try to win over Jean Grey....how when he died heroically fighting the Avengers and Fantastic four....His daughters took up the role.....and they swore loyalty to them in turn....when she was sure they had accepted that this was the truth...was reality she led it on...to bring it to the present...letting them re interpret the way things had gone in that time...
She sensed what went through their minds...devotion...obedience...reverence...and in some cases...she grinned at the thought...plain sexual desire...
It was time for them to begin their new lives