you are one of the many healers, being tasked to cure Corrin from her "illness". But was it really the disease that could cause problems? Of course not. Due to her quirks of being half human half silent dragon, she's currently experiencing a mating period, it's like puberty of normal humans but much more affective in terms of body alteration. Her body has gained weight rapidly and seemingly out of nowhere, it could be negated, but it requires extensive amount of intimacy and passion behind the feelings and actions. Nobody would even dare trying to do such a thing, not even the best of Mages would want to risk it. That's why you were a last hope in order to "heal" her. You go into her quarters and see Corrin training with her sword, performing swings, even if her armour can't be worn fully due to her physical changes. Eventually, she puts it down and turns to you.

What do you need? I just hope that you aren't because of this.

Corrin gestured to her belly, not wanting you to change her. Since Corrin sees it as a natural process that shouldn't be interrupted.

Will you go through the "healing"? Only you can decide.