Briefly a woman while going downstairs in the boat is fully nude. Her bare butt and side of the left breast is visible.
A woman changes and her backside and side of the breast is visible. The young man steals a look but she tells him not to look.
During a sailing voyage on a lake, a married woman and young man kiss passionately several times and then it's implied they have sex. When she lands ashore later, she admits being unfaithful but her husband does not believe her.