Crucible of Terror
Crucible of Terror is a 1971 British horror film directed by Ted Hooker and starring Mike Raven, Mary Maude and James Bolam. Its plot involves a mad sculptor killing women to use as models for his statues.
They travel to Cornwall with their wives, and they find it an odd and disconcerting experience. Victor Clares wife has regressed into a second childhood, while he spends his time having affairs with his models. The only sense of normality is apparently provided by Bill, Victors only friend, who cooks dinner for them.
Source: Wikipedia