Warbis had called at the house earlier in the day and established the victim was on her own.
Judge David Boulton said Warbis posed a high risk of serious harm to the public.
Defending, Deborah Gould said that Warbis believed the victim was awake and consenting to sex because he was under the influence of drugs.
Former council leader Malcolm Pratt has stood down and old Labour members Steve Ibinson, Mike Smith, Fred Walker and Christine Warbis did not stand.
They thought of all the things that need to be there," nursing manager Sannie Warbis said.