An affair with your wife's neice???

This was pretty shocking to me. What kind of man would have an affair with your wife's niece. Talk about an insult! Talk about a family killer! Fortunately it appears ... according to Wikipedia .. to be a ruse. See here ...

Patton's niece Jean Gordon appeared again; they spent some time together in London in 1944, and again in Bavaria in 1945. Gordon actually loved a young married captain who left her despondent when he went home to his wife in September 1945. Patton repeatedly boasted of his sexual success with this young woman but his biographers are skeptical. Hirshson says the relationship was casual.Showalter believes that Patton, under severe physical and psychological stress, made up claims of sexual conquest to prove his virility.D'Este agrees, saying, "His behavior suggests that in both 1936 [in Hawaii] and 1944–45, the presence of the young and attractive Jean was a means of assuaging the anxieties of a middle-aged man troubled over his virility and a fear of aging."

Thus said this film takes great liberty in the way they portray the relationship between GSP & Jean Gordon. That's kinda screwed up!