Pretty safe bet that she’s got some shorts on under that shirt, but it’s still not appropriate for any decent workplace.
Typically, women who wear clothing that exposes their legs in an office situation will be required to wear nylons, and the rule in most places is that the clothing must at least get to mid-thigh. Some places say 1 to 2 inches above the knee. this classless entitled princess exudes trashiness and bitterness. Not a good combo.
Hate to break it to you but nylons in an office setting went out many many years ago. I worked in corporate offices and didn’t wear them along with everyone else I worked with. That was 15-20 years ago.