I have a friend like this.
Her father screwed around while her mother turned the other cheek. All very stiff upper lip and never discussed. V wealthy, dis functional family. Friend's mother would constantly bang on to friend that it was essential to keep her man happy, to get back into shape after childbirth etc... I even have heard rumours to indicate that dear friend was pressured into having a nose job at some point.
As she grew up, under critical scrutiny by her mother and aloofness from her dominating father, she learned that the only way to succeed was to marry well and hold on to her man at all costs.
Friend is deeply insecure. All the signs: bangs on about her marriage, bangs on about their sex life, deeply jealous of her (very sweet and lovely) dh. Assumes all women are after him (snort). Sees other woman as a competition. All a bit tragic really.
She constantly makes references to being there to service her dh, who seems to want sex every day, and really doesn't think she has anything much to offer him 