Family Demons (Australian Horror/Thriller) is not strictly about a dead mother haunting her daughter. In fact, there are many components of this film that are very realistic and sadly very common in society. I couldn't help but feel for all family members in this film despite the complex family dynamics. There are some interesting twists and turns and, although the opening words at the beginning of the film discussing Adelaide didn't seem to resonate or make much sense with regards to the film itself (not sure what the writers were getting at as they didn't "fit" much), I was both enthralled by the entertainment yet cringing at the same time. There are important messages and lessons to be learned from this film about family, sexual assault, psychological and physical terror and much more. Yes, for supernatural horror and slasher fans, you will likely be satisfied as well as those that enjoy thrillers.
It is my hope (but I have to be realistic) that the events that occurred in the film prior to the hauntings are less common in society than I'd expect. Sadly, I doubt that is the case which is why the message is so important.