Killer(1991)

Tired of never having enough money to spend, Rita and Susanne throw all bourgeois moral concerns straight out of the window and simply become contract killers. With their little heads and guns, they bring a few unpleasant contemporaries around the corner and collect a tidy sum for their own use. The whole thing is so covert that even her husbands Herbert and Ralph don't suspect a thing. But then the cunning private detective Mazulla gets onto their trail and seems to see through their murderous scam...