The Lovers,” written and directed by Azazel Jacobs, is a humorous examination of long-term married life — if your idea of married life is that both members of the couple are having adulterous affairs with demanding younger partners.Happily ever after is a distant memory to spouses Michael (Tracy Letts) and Mary (Debra Winger), who, unbeknownst to the other, each plan to call it quits once their son is back at college.They announce — promise — the matrimonial drop-dead date to their respective lovers …