Nina Takes a Lover (1995)

Stop. Rewind. That's the temptation, anyway, midway through Nina Takes a Lover, an implausible but sadly romantic tale of extramarital love. ''Bully for Nina,'' you'll be thinking, ''and her fabulously erotic affair with a roguishly handsome stranger. She's having the fun, not me.'' But your fun is coming at the end, when the mysteries of the adulterous dalliances are cleverly revealed as not what they seem. Indeed, this ends up being the best advertisement for marriage since the gift registry. B