The House of Yes

Twin siblings maintain an incestuous relationship over the course of many years. Their mother turns a blind eye to it, and the male twin's fiancée is willing to overlook both the incest itself and the infidelity, possibly because she has sex with her fiancé's younger brother. The younger brother seems sympathetic but ultimately only adds to the dysfunction.

Twin siblings maintain an incestuous relationship over the course of many years. They're seen having sex once, with no nudity, from a distance after becoming aroused reenacting the Kennedy assassination. A man has sex with his brother's fiancée; one or two light kisses are shown, and the man's bare chest in bed is seen. "Come" is used as a double entendre a couple of times. Masturbation is mentioned a couple of times. A couple is seen in a bathtub from the chest up. One kissing scene where the couple starts to remove their clothing.

Pepsi mentioned specifically several times. Pepsi cans and partial views of Bacardi labels are prominent in one brief scene.