Originally Posted by
JVPhoto
Is there something in all of them that can cause you to be allergic to all nuts?
She probably has a tree nut allergy rather than or in addition to a peanut allergy.
https://www.foodallergy.org/allergens/tree-nut-allergy
That being said, I don't think she was out of line to request he abstain, however, she could have done it in a much more polite way which likely would have garnered a more sympathetic response from the OP.