>>2186590C,
I feel like it might be worth asking Medea a couple questions on the way back,
1) "Are any of the other girls in the cabin involved?" Erika had proposed the spin the bottle in the first place as I recall so she might be. I'm also not sure if Medea can answer this question based on her super natural rules, but I feel we should ask.
2) "Are the other people at this camp that are more then they appear?" Medea may not know the answer but she should be smart enough to know that question implies that we are asking about any kind of super natural persons, while also being vague enough to not break any super natural rules, Knowing the answer to the second could save lives in the future.