Not for kids, help me!!?

Hi, i am 15 and i am a really sweet kid and i would never do anything to hurt anyone. There is this girl i known for a while and i like her and she now tells me she likes me alot, she 13 but very miture. i have been biking over to her house a lot and seeing ehr and her parents love me. her parents kinda mest her up and she is very sad a lot. she very pretty to. every body loves her, girls are jelouse. thing thing i am asking is if i am write or wrong let me tell you what she told me. i biekd to her house and she has this secret spot and she was like whats the worse drug you've done and i said pot and i asked her and she was like pot and she told me about this bad thing that happened and she told me that i mite think diffrently of her, she told me she smoked lemon kush and it made her fall asleep and her mom was sleeping and while she was smoking older guys came over in a car and cam in and one guy took advantage of her, but she said they did not have sex. and she wont tell me who this guy is, so basically she feel asleep and some *** but raped her. and i was totaly shocked and i look at her very diffrently and i am very mad this happened, am i wrong for being upset and looking deffrently at her, please help!!:(