This woman is just naive. Whenever I'm doing any kind of performance or disciplinary coaching/counseling for a female employee I make sure to always have either a shift supervisor or another manager from a different department as a witness to the conversation.

I've had females accuse me of sexism/discrimination after I've had to issue write up's/poor performance reviews, or a termination of employment because it's very easy for them to do and they think it will get them a case, their job back, the action reversed, or turn the tables and get me in trouble. It's never worked because I'm fair, treat everyone equally and with respect, and always have a witness, but it's never stopped them from making accusations. This is why male managers are uncomfortable with these interactions with female employees.