Actually, I remember seeing a little special that Bob Denver and Dawn Wells did with a sort of gossipy tone, and I got the distinct impression that she was an insincere, mealy-mouthed little back-stabber. Dawn Wells, I mean. It was a long time ago, though.
Bob Denver had a radio show that lasted a good while. I remember him talking about Tina and Russell (professor) sneaking off for quickies and taking long lunches together.
Maybe his radio show is what you remember.