full-time coworker had to call out because of her sick sister; my boss gives her less than 10 hours as a punishment

coworkers sister was sick, and she had to call out for a while to take care of her. my boss, who’s had a history of just being a dick, decided to put her at 9.5 hours despite the fact she’s signed up for 32+ a week as a ‘lesson’. the cherry on top is that in messing up the schedule, he fucked everyone else over as well. our schedules are completely messed and now we’re all scrambling to find coverage in our 6 person department. biggest fuck you to my boss