The woman going 50 mph in a normally 35 zone but 20 mph school zone was in effect. She blew through a stop sign, hit the man who had right way, spun out and hit both the front and back of Sis's car. Sis was stopped at the stop sign.
She insisted on going to court, then threw a fit at Sis, man driver, and neighbor walking dog who jumped out of the way who came to court to testify. Didn't they know they weren't supposed to show up so she could get off. She actually wanted to know how they "found out" about court - um they were subpoenaed.
She got defensive driving (and increased insurance rates but that isn't court ordered). She should be thankful no-one was hurt.
Side note - I made Sis run their cars through https://vinrcl.safercar.gov/vin/
after a friend was nearly killed by a faulty airbag. Her car wasn't on the list but she passed on the web site to some friends and at least 2 of them are now on the waiting list to get their airbags replaced. After Sis's accident they got scared to even drive around the neighborhood. One was lucky a family member had an extra car she could use. The other one can't sell, is avoiding driving as much as possible (In Houston).