At the very least, she received a verbal warning. Their property, their rules.
OSHA,EEOC,EPA,DEC,N.O.W.,A.A.R.P.,NAACP and every other alphabet organization might argue the point.
I work in a family business - it just aint so bub - the government mandated rules are quite clear
she stands to own the place...........at which point I'd promptly put pork rinds in the vending machine