Seems pretty obvious from a narritve point of view, doesn't it?
The setup, as I said before, is stupid, starting with the question how some of these people are called her friends since none of them behaves like one, followed up with why on earth she would even be on this vacation. Either put more effort into making that plausible or just have her kidnapped. Which probably would lead to other problems when she needs to interact with her so called friends, but that's the setup.
Going forth from that point, which can still lead to a good story, a pure lesbian route while she needs a pure male substance, doesn't work out.
Anyway, I have hope for the revenge route, lets see where we can get with this.