The problem she has is that while not widely reported in the British media, (although openly discussed in Israel and Cyprus), a video apparently exists of her enthusiastically consenting to the group sex with the men in question.
Now obviously the situation could have drastically changed once the video stopped being recorded as consent can be withdrawn at any time, but it does call into question her entire story as she clearly claims that she only consented to sex with one of the men, and the others being there was against her will.
Very difficult to get to the bottom of this whole thing.