Her call to his home was an earned payback. She was a bit out of control, but right on target regardless.
How DARE a child be so ill-mannered to pick up the phone and just call their home so casually; if he expects to be treated as an adult, he must learn that this is not how adult business is done. Methinks he has a looong way to go yet.
Unfortunately for our society (which has become very selfish and rude), his way of thinking/behaving is quite common nowadays; someone with authority over him has made a decision, he doesn't agree with it, so he feels it's ok to brush it aside and inconvenience the person with said authority. Great. One more whiney pissant asshole kid to add to the pile.
Don't like it, then go through the proper channels to change it in a professional manner. Call my house & the gloves come off.

These are available through Dr. Fosters and Smith (catalogs and online).
We have one (a larger model) & it works GREAT - but it only 'digests' waste at temps above 40 degrees.
Waste can be deposited in it year round though, and it's nice for all of us having a doodie-free yard to walk on!