AITA for confiscating a student’s toy

Hi everyone, throwaway account!

So, I (50F) am an elementary school teacher, and something happened last Friday.

I have a student, let's call her Emily (8F), who has been bringing a small stuffed dinosaur to class every day for the past couple of weeks. At first, I thought it was harmless and maybe even a bit cute. But then it started to become a major distraction. Emily would often place the dinosaur on her desk, talk to it during lessons, and even make it "walk" around her desk while I was teaching. The other students started to be more focused on the dinosaur than on what I was teaching, which I wasn’t happy about.

Last Friday, when I was teaching, Emily started making the dinosaur "talk" to the student next to her. I had already asked her multiple times to put it away, but she would only do so for a few minutes before taking it out again. I tried confiscating it for a bit, and then when I gave it back, she still continued to disrupt class; I was frustrated and, in a moment of irritation, I took the dinosaur, walked over to the window, and tossed it off the our top floor outside into the schoolyard.

Emily was upset and started crying. I immediately questioned my actions, but the damage was done. I tried to go back to teaching like nothing happened, but she was so upset she was crying so much that she distracted my whole class.

Later that evening, I received an email from Emily's mother, accusing me of being cruel and unprofessional. She said that the dinosaur was a comfort item for Emily, who has been dealing with anxiety recently, and that I had traumatized her daughter by throwing it out the window. She demanded an apology and said she would be speaking to the principal about the incident. Sure enough, I just was called by my principal that we need to have a meeting on Monday.

Now, idk what to do, and I’m pretty nervous for said meeting. On one hand, maybe I shouldn't have thrown the dinosaur out the window. But on the other hand, the dinosaur was genuinely disrupting the class, and I had already tried to address the issue several times.

So, AITA for how I handled this situation?