I was in a supermarket today when a lady started talking to DS1, who has autism. DS1's speech is delayed, so it's very unlikely for him to respond to a stranger talking to him.
Anyway, the lady then said "oh, aren't you talking to me?" to DS1. I didn't want to tell her that DS1 has autism, nor did I really want to say anything about DS1's difficulty with his speech. DS1 understands a lot, even though he can't say as much.
What do you think I should have said to the lady?