Half banana - "...the old lady was quite a sweet, well meaning but truly obsessive pioneer. A few years later she was put permanently into a home for the mentally ill."
Years ago, an older lady in my congregation confided to me that she seemed to notice more and more JWs - particularly women - who were suffering from mental health problems.
At the time, I didn't think it wise to suggest that maybe the JW worldview and lifestyle might actually be the reasons, but I'd be lying if I said I wasn't thinking it.