Charulata: The Lonely Wife (1964)
The lonely wife of a newspaper editor falls in love with her visiting cousin-in-law, who shares her love for literature.
emotional cheating
The Love That Is Wrong (1993)
A girl in a lesbian relationship wants a male suitor to impregnate her. Her partner reluctantly agrees and gets really hurt when she sees her screwing the guy and really enjoying it.
Effie Gray (2014) – Dakota Fanning
An old, rich writer marries a young girl but does not consummate their marriage. The young girl falls for a painter while she and her husband are together with him in a remote cabin somewhere in Scotland.
Bali (1970) aka Incontro d’amore – Italy
A wife wants to cheat with a husband’s friend, but he’s too immersed in his spirituality crap to care.
Eyes Wide Shut (1999) – Nicole Kidman
A wife flirts and dances real close to an old man she is attracted to at a party. Plus, her husband imagines her getting banged by a naval officer she has the hots for.