According to the local news the day the main video was shot, there is video of her saying that. The bus driver is responsible for what happens on that bus, and at least in all 4 districts my wife has worked for ( including Greece) the monitors report to the driver and the driver deals with any incidents with the head of the garage who reports to the various principals and vice pricipals. The driver is not the monitors boss, but that's the way the info flows. Karen was a driver for many years so she knows how it works. If she didn't see action being taken in a reasonable amount of time I agree she should have done more, but that hardly makes her an enabler. She's been there long enough to know how long it takes for the district to take any action, which can be slow at best. For all she knew the process was in motion.
Same type of thing with teachers aides. They report what happens in the class to the teacher even though the teacher isn't the boss. My wifes current aide was the subject of a hostile environment with her previous teacher, took the district 2 months to take it seriously and move her after she went all the way to the top.