I could say so much about this movie, but it would be a waste of energy. The premise is not that bad, but in every other aspect it fails: the script, the editing, the dialogues, the settings: it's all sad and uninspiring. The only good acting is by the mother (Marlyn Mason), but the heroine of the story and the few other characters really acted below par.
Probably the makers thought that a touch of realism would make things better, but the scene where the mother secures the semen of her retarded son is quite appalling and I watched with disbelief how she walked around with the result and injected it in Amanda. The horror was not so much in the goings-on themselves (I usually can take tons of horror and gore!) as well in the fact that they really thought it necessary to show all this distasteful stuff.
The courtroom-scene at the end was a bit surprising and could have made for a decent closure, but alas, they wanted to spring on us the obligatory final twist i.e. the start of a whole new chain of horror. What can I say: it was.... well, preposterous is the best word.
I rank it not 1 but 2 out of 10, just for Marlyn Mason.