That's absolutely horrible. My little brother has celiac and sometimes we joke about giving him gluten, but only because that type of joke fits his boisterous humor. We would NEVER ever in a million years actually do it, because we aren't morons and we understand how dangerous it would be. In fact, since he was diagnosed just over a year ago, my parents have made their entire house gluten free. They will eat gluten at a restaurant but there's no gluten in their house so as to avoid cross contamination. Sometimes I think how hard it must be for celiacs whose families aren't supportive. Sounds like yours is so far from being supportive it's dangerous. I'm really sorry they thought that was even a remotely funny "joke."