A woman mentions that her husband is with his mistress.

A husband and wife are in bed having sex; we see mostly their heads and the male's bare upper body moving, but you can see one of the wife's breasts very briefly

The naked backside of a chambermaid is seen as she runs from the duke's room after sex.

We can hear but not see Bess and the duke having loud sex.

We hear but do not see the duke rape the duchess in her bedroom.

Bess, staying for a sleepover with the duchess, explains that lovemaking can be pleasurable by telling her to shut her eyes and imagine Grey and then gently stroking her torso and possibly lower (offscreen). It is not clear whether the gasps of pleasure are a result of the fantasy or the physical contact.

The duchess bangs Grey in her bedroom , she is on top, she is dressed, he is not.

very mild

Moderate, but infrequent

Wine is drunk with most meals; in one scene the duchess is clearly drunk and ends up totally disgracing herself by stumbling into a candelabra. She also drinks during her pregnancies.