I only recently learned of this about Marin Zimmer Bradley, child abuse accusations laid down by her daughter Moira Greyland. There is more, in Greyland’s own words, at Sounds like Weird, if you have the stomach (I only read part of Greyland’s poems about the abuse, I don’t have the stomach for more).
I knew about Walter Breen’s child abuse, he went to prison for it. I remember meeting him a few times at SCA events (when I was involved in the SCA) and at conventions. I seem to recall Breen wearing a button that read “If it moves, fondle it”, which was disturbing even to me. I could be misremembering who wore that button, it was quite a few years ago, but I don’t think I am.
This is sad as I remember reading many Darkover novels in the ’80s, and was recently thinking of revisiting Darkover. Not now. Not ever.