I used to have the same problem, i am only 15, so it wasn't that long ago. My father would not let us see ANY movies that might scare us or make us belive in any monsters, of anything of the sort. and when I was yonger, I had seen a small part of one of the "goosebumps" movies, and i couldn't go so far as two feet away from anyone with out being terrified. so if it is her friend that is making her upset, it might be because she is seeing scary things she has no need to see. if this is the case, i would sudjest that you call the childs mother, and ask her to monoter better thier actions. so now that my father has not let me see horror movies i can easliy go into dark basements and attics, that would terrify others, so if that is the problem (as much as they complain) they or she rather will thank you for it later
my opinion, hope that it makes sence, after all, i am only 15