Several brief sexual references, including cheating on one's spouse. The whole film revolves around the idea of cheating. No nudity.

A painting with bare breasts visible for a moment.

None.

Lots! The a-word, d-word, and h-word came up several times. S and f used a few times each. "Bastard" was also used several times.

Some social drinking of wine, one reference to beer.

The protagonist mixes medication and alcohol, he is advised against this.

A woman gets in a car accident (all you see is the crash and her lying, unscathed other than a concussion, in her hospital bed).