Having said that the fact she’s had relationships with at least two subordinates is worthy of at least a cursory investigation to make sure nothing untoward happened.
For me the saddest thing is that things like this when seized upon are often used to justify/promote biphobia by implying bisexuality is synonymous with infidelity and polyamory.
In completely separate instances, she (a) started sleeping with someone who was already her subordinate; and (b) hired someone that she was already sleeping with.
For me the saddest thing is to see people who might otherwise be positive public representations of polyamory or nonmonogamy behave so abominably in their professional life.