The nun in question represented no authority at the university. She was in no way part of the authority structure of the university and the student was not a member of the religious group.
The young girl can still be called a victim I suppose, but the nun was not an authority in the university.
Did you read the article?
“......... the nun supervising the school’s program to help women discern a religious vocation........”
The fact she was a nun puts her in a position of authority. It’s like a psychiatrist having “consensual” sex with a vulnerable patient.
Assuming the student/victim was, indeed a student at the university, she would be no more than 21-22 and very well sheltered at that (or she wouldn’t be at that particular school). The nun from the Spanish group would have been an older adult, well beyond any student’s age, and likely infinitely more worldly.
Even if the student did consent, or even was the aggressor in the relationship, there was a huge gap of age and maturity between them, and the older woman should have exercised better judgment than to become involved with so young a student. Or to have become involved with anyone, if her vows meant anything to her.