Conversation so far:
what were the allegations against charles taze russell?
mental cruelty, referring to forced celibacy and frequent cold, indifferent treatment by him.
who did he subject to cruelty ?
Russell's wife, Maria.
who made these allegations?
Maria.
were the allegations true?
Mr.
Russell denied the accusations.
did maria do anything apart from making these allegations?
she filed for legal separation.
was she granted?
The separation was granted in 1906, with Russell charged to pay alimony.
what other immoral conduct he was accused of?
"improper intimacy" with Rose Ball, by then a 25-year-old woman.

Question: what more is known about this allegation?
Self-contained rewrite: What more is known about the improper intimacy allegation against Charles Taze Russell?