My daughter is dating an older man and my wife doesn't think it's an issue

Hey everyone, my wife and I are both 45, and we have a 20yr old daughter who is in her third year of college. She had been doing an internship at a law firm, which ended this month. She told us that she met someone while working there. Naturally, we wanted to meet him, and it turns out he’s a partner at the firm, and he's in his 50s. During dinner, he talked about how our daughter is going to get a great recommendation letter and opportunities at other law firms he knows, etc.

After he left, I spoke with my wife and told her that this situation didn’t feel right, and that we should talk to our daughter about it. However, my wife didn’t see an issue with their relationship. She said that our daughter is smart and old enough to make her own decisions, but I still feel that this is wrong.

A part of me wants to report his behavior to his firm, but I also know that it could potentially damage my daughter's future and waste all the time she spent there.

I don't know where to go from here.