I'd be reluctant to call this social engineering. In my mind that typically refers to someone manipulating a third part to gain access to privileged information

I'd be reluctant to call this social engineering. In my mind that typically refers to someone manipulating a third part to gain access to privileged information on you. However in this case the professor willingly gave access to his devices and passwords to a manipulative individual. To me this would be coercion plain and simple.