Wow. She'd say that right in front of you, huh? While that can be taken as pretty rude, and she definitely is not the one to decide what you do or don't understand, her actions serve to both let you know that she is accepting of your condition (that its real, and you are impaired to a degree) and to possibly help cope with it herself. NT's have a hard time wrapping their heads around the concept of social ineptitude brought on by AS. We "get" it, its just hard explaining where it is exactly that we fall out of step with the rest of the world. She sounds to me that she's trying, in an awkward and assuming way, to show that she cares and is considerate. Aspies are notorious for well-intended rudeness, so try to understand. I don't think she's trying to be snotty or condescending intentially. MY mom would probably try to tear apart my assertion that I was slightly autistic, which is why I don't bother telling her.