The World At Her Feet (1927)

In a reversal of the usual situation, it is the wife, not the husband, who is the neglectful one. As hubby sits at home twiddling his thumbs, Jane starts her own prosperous business, becoming so absorbed that she has no time for anything else. Not unexpectedly, her husband begins keeping time with a gorgeous blonde, whereupon Jane wins back her mate by simultaneously inaugurating an affair with the blonde's husband.