That woman is like 80 years old and has had to deal with being named "Cranky" her entire life. I'd be grumpy, too.
Plus her perfectly normal granddaughter goes around telling strangers she has disorders just to get attention. This week it's Down's Syndrome, next week it'll be Aspbergers or Diabetes or whatever latest thing she heard on the telly.
One time she watched five minutes of Law and Order SVU without permission and then spent the rest of the week telling people she was a rape baby. Punky and her mom had a a very awkward talk about why that wasn't okay.