From the Terrace (1960)

You can't buy respectability by putting a wedding ring on it!

Alfred Eaton, an ambitious young executive, climbs to the top of New York's financial world as his marriage crumbles. At the brink of attaining his career goals, he is forced to choose between business success, married to the beautiful, but unfaithful Mary and starting over with his true love, the much younger Natalie.