The office is full of people, Tsukasa and Isla included, whose priority is to never let a giftia expire. I don't think they are going to break that duty and tradition starting with one of their own. Tsukasa has said many times he understands the situation and he also knows the reality from very personal experience from the work. So, it's impossible. Unless Isla is lost to some dungeon and she can't get out or be found in time...