One thing I would like to clarify: Karen and Richard's father, Harold, was a gentle and loving man. He was not at all demanding. Unfortunately he was under the thumb of his wife, Agnes. When you see Barbie/Karen being spanked, think of dear ole Mom, not Dad.
P.S. As you stated, Richard married the sister (Mary) of their road manager, Mark Rudolph. What was left out is that Mark and Mary were Karen and Richard's first cousins! (Their mothers were sisters.)