If you look at TV period pieces where married alpha husbands got kicked out for their cheating, the wife's accusation is usually "you embarassed me". It wasn't even that he had sex with other women. The real offense was others knowing she's a wife who got cheated on. She doesn't want her peers to see her that way. Ruining her image to her peers is the worst thing a man could do. Women marry safe betas in part because they think the beta will never embarass her like that.

Women of the 50s are a great tool to understand the motivation of TERP males. They run on the same operating system of insecurity, feelings, gossip, fear of social judgment, narrative-based thought, book clubs, and vanity. If you think of a TERP man as a Stepford wife, you suddenly understand all his desires and motivations.