Sexually molested (SPOILERS)

I believe that Michael was being sexually molested by his father all along and below you will find all the evidence I have compiled to back up my theory.

Watch the scene where Michael's father asks him if he needs help with his tie and starts to put it on while standing BEHIND him. While he is doing this, the mother looks disturbed and pretends she doesn't see what's going on and then the father says: see Michael, we have to FIT IN. This was a HUGE metaphor for the father have sexual relations with Michael, while the mother turns a blind eye.

Also, when the mother is being asked by the school psychologist if Michael and his father are close and she answers VERY and then she won't go specifically into WHAT EXACTLY they do together and then she looks down nervously.

And when Michael is over at the girls house and she play with him on the bed, she says: don't worry, it won't hurt and he says: please don't.

Also, at the end, when the father is going to feed Michael the meat (after he unties him) he walks over to Michael and says, here, let me feed you and then tells him that he will acquire the taste like his mother did and his mother then says that she learned to love it and then his father tells him to open up wide, while he's putting meat right into Michael's mouth. There was a bunch of sexual innuendos in that entire scene.

So YES, there is a STRONG insinuation that Michael is being sexually molested at home by his father, while his mother does nothing about, but again, A LOT is left ambiguous.

At the end, the mother stabs the father when he's taking Michael away. One could decipher from that, that she had enough and decided to finally protect her son from what he husband had been doing to him all along.