‘Realistic’ NTR - straddling the boundary between NTR, rape, blackmail etc but not fully committing to each. A good woman, genuinely in love with her husband, has kids she cares for etc being coerced or blackmailed into having sex with someone. She does it, but crucially NEVER ENJOYS IT AT ANY POINT. Think a family about to be evicted and the mother privately assents to a proposition from the landlord to avoid homelessness during winter. Or a husband battling cancer, medical bills mounting, prognosis doesn’t look good but there’s a promising experimental treatment. It costs money. Some rich guy - husband’s work rival, local drug dealer, whatever - offers to pay if she fucks him. Picrel in a way - Mrs Gump letting the gross principal fuck her to protect Forrest from the hell of the state special schools. Disgust, detachment, revulsion, shame, guilt, self-loathing, all across a realistic and well-told story.

Also - the viewer seeing someone kill a man, then after his death seducing his unaware wife and, years later, his daughter, both of whom have struggled with the loss and grief all their lives.

A well-meaning guy trying to get his act together, sabotaged by a colleague. Colleague is a prime asshole to MC, but whenever MCs wife is around the colleague seems friendly. Worms his way into their lives, engineers their breakup or a rocky patch through manipulation (think lady Windermere’s fan), ends up fucking the MCs woman.

Talking of Lady W’s Fan, a woman mistakenly believes that her husband is cheating on her. Goes and gets drunk, and is approached by someone the husband loathes - school bully, etc. fucks him in a moment of impulse to try get back at her husband, then discovers she reached the wrong conclusion and is wracked with guilt.