theres a big difference between going to a party to drink and have a laugh and going then getting raped!!

if she knew them as mates why shouldnt she go round?? theres hundreds of thousands if not millions of girls (and boys) who do similar and none of them expect to get raped.

In fact psychologically, being raped by trusted friends after being lured to this party just to be raped is far worse than being dragged off street due to the betrayal of trust, manipulation of the initially innocent relationship and the effects stemming from that.