I'm writing on behalf of someone whose much-loved child was born profoundly deaf, and with other problems, after a traumatic pregnancy and birth. The child will never be able to speak.
My mother when talking to her started raving about the fact that her (younger) grandchild could say "hippopotamus." This to a mum who would have been over the moon if her child could have said "mama." It seemed so tactless - AIBU?