Does that other parent realize that room mothers determined whether or not a food was safe for her child? I'd tell her so at least she knows this is happening.
no idea how to contact her.
at a birthday party i
met saw the pa mom. close quarters, she was dropping off a substitute cupcake, and I introduced myself as another mother of someone with a peanut allergy. ie: "oh, my son has a peanut allergy, I'm staying, let me know....blah blah blah..." and I got the cold shoulder. Ice freezing cold. Most pa, parents, in my experience, want to fit in. They don't want to be "THAT mom.". That's the feeling I got, and if a parent's wishes aren't point blank communicated in a classroom, that's the way I interpret it: "Don't bug me, I want my child and I to "fit" in."
They don't want to talk to us, period. We are the minority.