To add to what L said......did you ever tell her "no"? Put her in her place? Stand up to her? At some point in time she stopped viewing you as "the man". That dove tails into the bed room as well. I won't go into details but most women want to be handled a certain way in that regard as well. They want to be submissive to their man and please him. It's not about being submissive to her and pleasing her.
There are quite a few really good reads out there than can hopefully you gain a better understanding.
