I haven't been following the story (actually, I haven't had time to follow a lot of stories, school / work / my own writing keeps me busy), but I finally decided to throw my own .02$ in.
Tough scenes are part of a good story. Sometimes in life, bad things happen. When a story is written to be 'true', (as opposed to 'real'), sometimes bad things need to happen in it. In 'Heart and Home: Finding My Way Home Book 2', several major characters are killed in a completely random accident. It's devastating. It's horrifying. There isn't even a decent 'why' to be had. But it makes the story that much more powerful, and it insures that no one who reads Boudreaux's work will ever take what happens lightly. In my own writing, I wrote a rape scene for Guardians that literally pulls no punches. It got re-written a bit to focus less on the highly-disturbing physical side and more on the emotional trauma, but if anything that made it more potent, more powerful. I actually have trouble reading that scene; I wrote it 'from the heart' and to read it tears at me as if I'm the person whose pinned to the bed, helpless.
Sometimes, a story has to go dark places if you are to do it justice. While it's always wise to warn the readers ahead of time, never -- ever! -- apologize for it. It is what it is. And if anyone doesn't like that, they can go take a flying leap!