Challenges with Parents of Non-Allergic Children

My son just started preschool this year and everything has been
great. He loves it and the teachers are wonderful. However, I did have a bit of
a concerning conversation today with one of the parents while we were waiting
for our boys to get released from their class. I had noticed on the calendar for
the week that her son had a birthday coming up and I was very curious about
whether or not she would be bringing in a treat for the kids. She wasn't really
sure what to bring in because of the no nut policy. She wanted to bake something
for the kids, but she knows that the school has a policy stating that you can
only bring in certain items and if they are baked goods, they must be
prepackaged and labeled. I was just nodding my head in agreement and she was so
sweet and nice. She had no idea that my son is the one who is allergic to
peanuts and nuts in the class and proceeded to tell me that she asked a friend
of hers who also has a child who has went to or is still going to the same
preschool. This friend told her not to worry about it because she never goes
off of the list and she bakes things and brings them in all of the time. I then
told her that I was asking because my son is highly allergic to peanuts and
nuts and if they were going to have a treat I want to make sure it is safe and
if not I would bring something in for my son. I explained that I don't want him
to feel excluded. So I could tell that she felt bad and told me that she
planned on bringing a prepackaged treat if the teacher said that it was
fine.  Again, she was very nice, but I was irritated with her friend’s advice.

So what do you think about this?