It's a film about a family with two sons and the mother is really abusive towards the boys. She makes them take some pills all the time and she showers them with freezing cold or hot water for punishment. I think the boys die. The father is helpless against it.

I am pretty sure the movie you are looking for is called Bitter Blood. Here is the link to part one of the movie on YouTube... Bitter Blood (1994 TV Movie) part 1 - YouTube (http://youtu.be/mb4eB808A6I)