Heinlein-related question: What was wrong with Leslyn?

Whatever the problem was, it seemed to be progressive. The drinking seemed to be an effect rather than a cause (self-medicating). Anyone have any ideas?

Apologies if this is not the right forum.

Alcoholic, possibly with other mental illness. She was brilliant and talented but also unstable. I don’t know of a specific diagnosis but she was still extremely bitter and angry with RAH in the 1980s. A visitor to her home had her spewing abuse at a third chair as if he were sitting there.

But basically an angry, judgmental drunk.