Hi, DB. I can relate. I was beaten with a leather belt, bruised from stem to stern on many occasions, then required to wear clothing to cover up the evidence. I was too scared to report this to anyone, and it was pretty well accepted "discipline" in the '60's anyway. I was an extremely well-behaved child who would have done anything to win my parents' approval.
The sad consequences are that people such as your mother grow up not understanding right from wrong, understanding only pecking order. They can't stand up to those who have power over them, then often brutalize those who do not have any power. They don't even seem to understand the point of discipline, to teach and guide rather than to punish. I don't say I entirely blame them for only doing what they know how to do, but we do all have an inner voice that we need to listen to much more carefully than all of those external voices of arbitrary authority. Men like your mother's "friend" only want to humiliate people into unquestioning obedience, not real morality. That's why there are child molestors in positions of authority within the WT organization and other authoritarian organizations. These men see those without power as people who were put here only to obey them and do their bidding, regardless of right, wrong and harm done. Women especially need to learn that obedience is not morality.
I used to spank my daughter at the meetings, and I can see that she still bears the scars. She has a panic attack at any kind of meeting, religious or not, that reminds her of anything about her Kingdom Hall experience. When she was small, we had fun together, had tea together, talked together, played together, read stories together, and had an affectionate, accepting relationship. And then we went to the Kingdom Hall where children were expected to be better than adults. Sick!
Finally, my inner voice kicked in. My daughter was still young enough to have a good childhood, but (with my consent, I'm sorry to say) she lived with her JW father most of the time. Whenever possible, he would keep her from being able to see me. He would order her to another room when I was present, call me vile names in her presence, consistently behaving like the jackass that he was. But he lost his position as a elder and eventually became inactive. He recently reactivated himself (being one to never learn his lesson) and married a new JW wife.
Today my daughter is not a JW and just finished her master's degree in chemistry, but she still has issues. We talk a lot and keep working through them. Things are 'way better than they used to be and getting better still.
Congratulations on listening to your inner voice.