A Mother's secret

Throughout the whole book I was very curious in why the mother was so unhappy. I tried to see more of her point of view then anything. I mean her husband was a doctor who later in the story got a very nice raise. That didn't seem to cheer her up, it was almost just a small distraction from her unhappy self. You never saw them talk until later in the book when she is yelling at him and his new form of communication was to just leave and go to work. Which I did not blame him, I wouldn't want to be griped at all the time like that. She always seemed to hate on David. No matter what he did he was always getting in trouble. He could barley say a word to her without getting his head cut off! The only time you saw her facial expression change was when she was hosting a party or playing bridge. I thought seeing the way her mother treated David would explain it. Her mother must of treated her the the was she treats David right? That didn't seem to really be it either. She really hated her life. After David had his first surgery and was in his room, mother decided to come in and act nice, somewhat that is. It was almost like she was trying to help her guilty conscious because we learn David has cancer, so in her mind being nice before he "dies" helps her. She always seemed to do that to, make it about her. Many years after that when David was seeing a shrink for his problems he discovers one day after coming home early, his mom in bed with another women. A women we had met in the beginning of the book who mother was actually smiles around. It then explained everything. Answered all my questions, but then made myself ask new ones. Mother was hiding from herself. She was unhappy in her marriage to Ed because he was a man. She was clearly a lesbian and in those times it wasn't talked about. Just the look on mother's face when David walked in was almost like a sign of relief. She didn't have to hide anymore. Her secret was out and she knew it, and was just waiting for that moment. Mother just wanted to be able to be herself and she couldn't.