User blog comment:B214/New anime 2017 discussion blog/@comment-97.86.117.132-20161230234256/@comment-10330822-20161231180449

Which is curious. I wonder why she did that. Perhaps the responsiblities consumed so much of her time that she couldn't be with Ise often, so she ditched the role rather than not see him as often as she could. Besides, Millicas is a pureblood, so I'm sure most would have been fine with it, because Ex wouldn't have been a pureblood.

It's also possible, since she is Ise's proper wife, if Ise got a higher title in the future, she may abandon the "lesser" title to Millicas to be Ise's consort. Like if he was made a Great King or Archduke, he'd technically outrank the Gremory.