No, but it could have been had Susan not interrupted Steven and Mary. As a bystander, Susan noticed Mary was uncomfortable talking to Steven. This is called a bystander intervention. A bystander can interrupt the harassment by engaging with the individual being harassed. A bystander can also check in with the person who has been harassed after the incident to see how they are feeling and let them know the behavior was not okay. A bystander can record or take notes on the harassment incident to benefit a future investigation.