Was I out of line?

I teach second. Today a student brought mini cupcakes for her birthday over the weekend. After we passed them out and sang, I sat down to eat my mini cup cake and talk to the birthday girl. a different girl said 'wow, Mrs.. you're eating your cupcake so fast' I replied that it's not polite to comment on how people eat. She seemed upset and later I saw she was crying (she cries everyday about things from home, friends or recess drama). when I asked what was wrong, she apologized for what she said, I said that I'm sorry our interaction left her feeling sad, we hugged and it seemed like the situation was over. Well, I guess it was a big deal because her dad dojo'd me and asked why his kid came home crying for 'noticing someone was eating a cupcake' and if someone got offended.

I was not offended, I I just don't like how a couple girls in my class analyze how each other eat (or most recently how I eat), instead of just enjoying the food.

I wrote him back a run down of what happened, what I said, our follow up conversation and then at the end threw in what a good student and how kind his daughter is. I also offered to talk to her again tomorrow. Idk though, I still feel nervous this is going to get further blown out of proportion.