No nudity. (The only "nudity" would be a man without a shirt on)
References are made to a man visiting a "knocking shop" (that is, a brothel).
A man and a woman are in bed. It is clear that they had sex.
A woman is persuaded by her lover to have sex with another man.
A woman implies to her husband that he has her permission to commit adultery.
Two different male characters commit adultery. In one instance, it is with the wife's permission.
A man and woman kiss. Some may be uncomfortable with the rather large age difference between the two.
An audio recording of a sexual encounter is played. It is a sad, emotional scene.