My Frau - dr Chef (1975)

Bobby Jucker's soap business is on the brink of collapse. The resigned manufacturer expects to go bankrupt soon. So he doesn't mind letting his wife take the reins and putting on an apron himself. Clara Jucker is tired of being a housewife anyway. Bobby is already gloating over his wife's failure. But Clara turns out to have a talent for business, and instead of impending bankruptcy, her husband now has to cope with his wife's success. What makes the situation even more unbearable is that Clara seems to get along very well with her new assistant, Binggeli-Braun. Bobby Jucker's envy is now compounded by jealousy toward his supposed rival. A fight is inevitable.