My (28/m) fiancé (25/f) is having her bachelorette party tonight and called me drunk and told me some things that bother me.

My fiancé and I are getting married in 4 weeks. Her girlfriends planned a bachelorette party for her tonight and they’re all drunk at a bar. She just called me completely hammered and said “hey I have to tell you something. I had sex with a black guy 7 years ago in college and I said hi to him tonight at the bar. I wanted to call and tell you in case one of the girls tell you about it.” I got upset and basically hung up on her. What the heck? Why would she call and tell me that. I don’t even know why to think right now.