Her books became more erotic as she herself began exploring her sexuality, got into Polyamory and swinging, etc.. Her necromancer main character in the vampire series is very much based on herself. That series became more grounded eventually, returning to the procedural action mystery roots. It remains very good. The Fey series is also good, but is purely erotica.
I assume, without a grain of evidence, that Holly is likely based on LKH, as she also came from a restrictive religious background and hit instant fame with her first book, and got into some really kinky shit as she explored her sexuality more. Could be wrong, but there are definitely parallels.