Son is due to sit transfer test in a few weeks. We went to familiarisation session recently at the school where he is due to sit the exam. My son is getting extra time. The children with extra time had to sit in a different part of the assembly hall away from the other children in their class. Another melter of a mum who I normally dodge on the school run, and who is maniacally competitive, asked my child (out of earshot of me) why he was getting extra time, also said to the facilitators that he shouldn't be in the extra time group, waited for us outside and then rang me afterwards (I missed the call). Fact of the matter is, (a) it's due a mixture of mental health and a few neurodevelopmental issues; and, (b) it's none of her business. Nonetheless, I'm worried she's going to try to do this all over again to my son outside the school. I only collect him once per week, so can't fully protect him. What response would be appropriate?