My Friend Was Raped

So I (f27) have a friend I've known since 6th grade. I don't talk to her very often but recently she told me that she was r**ed 9 years ago when she was on a trip to Samoa with her family. I was shocked and trying to be supportive but I was surprised she was so graphic about what happened, I feel guilty because she told be how she came because his penis was short and wide with a big head and she had to perform oral on him and I got very wet from hearing it but I didnt say anything although I masturbated later while thinking about it