Skyler White

It was fairly early on that a guy stood up and said, Why is your character such a b***h?
I started watching Breaking Bad late this summer, but before I started I already had a good idea of the characters and plot -- so the scene came as a shock. If this main character raped, or at the very least sexually assaulted, his wife, shouldn't I have heard about it? Why don't we discuss the fact that Walter White sexually assaulted his wife?