This is a dark movie that isn't characterized by positive messages. Bad things happen to good people, though some at least attempt to come clean about difficult secrets and/or overcome pride to heal a family rift.
The violence -- reports of domestic abuse and mob killings -- takes place offscreen but has an impact. A presumed mob killing isn't shown but is meant to linger in the mind. A young character is a pyromaniac.
One scene of characters having sex in public; both partners are almost fully clothed. Less specific/adult talk of sex than typical in a Woody Allen film, but it's still present. An extramarital affair is key to the story, so viewers see several encounters beginning or ending (arriving at a bedroom, etc.).
Language isn't constant or extreme but includes "goddamn," "hell," "crap," "Jesus Christ" (as an exclamation), a possible use of "f--k" (hard to be sure), and some name-calling and derogatory ethnic terms.
Virtually no drinking or smoking until the final third of the film, when characters crack under stress. Then there's drinking/drunkenness and stress smoking. The drinking, particularly, is presented negatively (one character is an alcoholic who's trying to overcome his addiction and history of domestic abuse).