Sisters Manager Impersonated Daycare Worker, Told Her There Was An Emergency Involving Her Infant

Short backstory, My sister is currently working in a medical office with a hostile environment where the manager abuses her power constantly.

Sister has 2 small children, 2 years (f) and 5 months (m). They go to a daycare while my sister and her husband work. The daycare is attached to her husbands workplace (a school), so he's on the same property as his children. If anything were to go wrong he would be the first parent there.

My sister had a last minute call for a working interview at another medical office, in attempts to get away from the toxic environment. Unfortunately the working interview could only be conducted on a day she was already scheduled with her current employer (yesterday). The doctor above her knew about the interview, and told her she should take the opportunity.

She called out of work for the day to go to her working interview.

While she was at her working interview, the receptionist came to tell her there was a call waiting for her. She was quoted the call by the receptionist, it was - "Hello, is ______ there? This is (daycare where children are) and we were told by her husband to reach her at this number in case of emergency. There's been an incident involving her son (5 month old) and we need to speak to her" Panicked, she accepted the call (knowing that her husband would never tell them to contact her when he's on the property, unless it was something insanely serious involving the school). It was her manager, asking her why she called out to go to the working interview.

In doing this, the manager not only told a random office (that my sister does not work for) where they could find my sister's children. She also caused the staff and my sister great distress with the false statement that something had happened to her baby, and with the later realization that she was just stalked by a manager willing to do such a thing. The medical office staff are concerned for her safety. Frankly, so am I.

Besides trying to get a meeting with HR, pulling the call as evidence, are there any legal actions she could take? Or any other recommendations?