Seeking expert testimony is a sign of strength. A personal relationship with a caring professional is proven clinically effective.
I believe that I can help.
This is a very credible story. This woman was abused when she was young, by her brother and by his friends.
Perhaps she is an alcoholic because of this.
OF course his mother will support him. To do otherwise would make her appear to be a neglectful mother, and perhaps she was.
Your husband would not admit to anyone that he was guilty of incest which is one of the biggest taboos in our culture.
There is no way to prove it, but it is very credible and may have happened.
There is nothing you can do about it as it happened long ago, and is not something that your husband will admit and may even have suppressed it from his conscious recollections.
This is old history and doesn't affect things now unless you begin to have obsessive thoughts about this.
Try to let it go as an unsavory possibility that can not be proven unless your husband steps forward and admits it - and he will probably not, whether it is true OR false.
Elliott, MAE, LPCC, NCC, CCMHC