<font color="#000088">Hiya Hangingon
There are a lot of parents that have their own emotional hangups and are better at denial than actually dealing with a problem. Denial as you know, always makes it worse in the long run. It's a great idea that your going to therapy, and it's all your grown-up, adult decision. You spent a lifetime hiding the abuse and trying to appease a non-receptive mother. I think she needs therapy from what I can tell, but... anyway, I can think of far more important things to be doing with my time than trying to appease a mother who is impossible to please. Luckily that your an adult now, you don't need her permission or approval. I don't think her way has worked.
No offense meant toward your mother, but it sounds like she doesn't want family secrets aired at all. She probably feels some shame, and has possibly many years of denial. Would she say for you to pray your cancer away? Radiation therapy isn't necessary? I think if it was my mother, I would tell her something along the lines of how God enables people to take control of certain aspects of our lives, and and that this tool He gave us empowers us to seek the help we need. The only thing I would caution is sharing things with your mother and/or sisters that isn't necessary to share. If your mother is critical of you, I wouldn't share much of anything. Personally, having a frigid mother myself, I consider personal knowledge about me a privilege that is earned, not a right.
Best wishes mate,
MAX</font>