My sister suffered from an egg allergy as a child. She doesn't seem to any more and it was never dangerous-an upset stomach generally. Today I went to a lot of effort to do a buffet for quite a few family members. There was quiche and coleslaw. My sister refused to eat anything even though she could see that these things weren't coming in to contact with any other food or cutlery. Then she asked me if it was safe to eat a cake that she herself brought - I.e had the knife that I took clean out of the drawer touched anything else. I just found it so rude and over the top when I had made the effort to cook (with 2 children under 3...).