What would you do if you knew your girlfriend was propositioned by a leading professor, or else?

When they incessantly solicit for money-It makes it so very hard for me to volunteer scholorship money, or any money for this college even with the great times, and education I had. Subconciously, it alway gnaws at me doing it.
This was a while ago, no witnesses, just her recount to me, and the potential consequences which were hers and my lower grade for his class. I was young and naieve, and I was just glad she didn’t go for him, a ‘D’ for both of us and we graduated.
Ironically, she continued with a post graduate in family law.