blinky: You are mistaken. A Jewish store owner cannot sell pritzus to another Jew. See what the Steipler had to say about that. And the shop owner DOES share the aveira — including all the thousands of additional aveiros by people who see her wearing pritzus.
And the husbands ARE responsible for the wives and daughters. Unless she is a moredes and refused to listen to him telling her not to wear pritzus (in which case he must divorce her without her getting the kesuba), he fully shares the many aveiros with her for allowing her out that way.