Stefan contacted the university administrator and explained the current situation to him that involves the welfare of his wife. With his money as well as the donations that Reuben provided, the head of the school agreed to his request with one condition – they needed to make sure that no innocent students will be involved in this war against Napoleone. If something happens and the students get hurt, Stefan will be held responsible for their lives.
Of course, Stefan has made his preparations, too. So, when classed resume, Cayenne wasn't that worried. At least, that was how she appeared in front of her husband.