She has faced a traumatic event and most likely is not thinking the event through but is focusing on the guilt of being blamed or being labeled a "slut".
What "traumatic event"? She got hammered and took a strange man home with her - how can that be anything other than her own fault?
We play so fast and loose with what we call "rape" these days that it does a disservice to women who are *really* raped, as in violently forced to have sex without their consent. The woman in this story was not raped; she had a consensual sexual encounter that she later regretted, and that is not rape.