I made a girl have an allergic reaction because I didn't believe that her allergy existed.
Why did you doubt her allergy so much?
I made her eat foods she wasn't supposed to.
You shouldn't assume someone is lying without any proof at all. And you definitely shouldn't act on it the way you did. What you did could potentially have killed someone and was extremely irresponsible.
She's probably lying because she didn't want to eat those foods. I mean, there aren't many other reasons to have an allergic reaction besides eating something you're not supposed to.
You should have just taken her word for it. I think that it was wrong to think that she would lie about it.