There is a town in SW Connecticut that the main characters move to (i.e., from other parts of the NYC area) that turns out to be a place where a country club run by a creepy old guy named "Diz" (because he used to work for Disney) makes a robots to resemble new members' wives (i.e., the reason men move their families to this place is to get this done), with the original wives "disappearing" and the robots taking their place; part of the process is that another member of the club claims to be a linguistic professor that wants to get women to record themselves saying a bunch of words. Three of the original wives are all uppity with a bad attitude, interested in femynism, not wanting to cook & clean, etc. that wonder why all the exiting "wives" there act so strange (i.e., being very deferential to their husbands, and wearing a certain style of summer dress, very interested in cooking & cleaning, etc.), and as the movie progresses, these original wives are seen to "transform" into good-attitude women that are no longer being uppity and have the strong desire to cook & clean around the house, while the remaining ones wonder what's going on. When the first of the 3 (i.e., the one who is the same actress that was Ginger in Gilligan's Island) "tranforms", the other 2 - the main character and the tall, leggy one - get a little suspicious. Finally, the last normal wife (the main character) figures out what is going on when the tall leggy one gets "transformed", and tests her theory by stabbing her friend, which doesn't bleed and starts manfunctioning, dropping stuff on the floor, etc. - and then goes to the country club where she sees her replacement - with much bigger teats, of course, but also not quite finished as she has completely black eyes - and her replacement is seen walking toward her with a strip of fabric that looks to be used to strangle the real one. The final scene is the local supermarket where are the new wives are shopping, saying hello to all the other "transformed" wives, including the last wife. There is a regular couple (black) there as well, with the wife arguing with the husband (is she next to be transformed?).
I actually popped an erection when the tall, leggy wife got "transformed".