
I get her willingness to help and be useful to Kay after discovering she is a relic sorcerer. However, she didn't take into account how he would feel or those who love her feelings if she were to sacrifice so much of her life to build what her husband wants. It's commendable to want to be useful even knowing the risks, but Kay is seeing beyond them and doesn't want to use her like that at all. He cares for her, loves her, she has already been out for a week, so why put her through more than she can handle?