Forget the automakers. Private investigators could use a bailout, too. As the recession takes hold, people who make a living busting unfaithful spouses have seen a significant drop in their once-lucrative trade. In Boston, for example, private eyes say many potential clients are too worried about losing their jobs—and their savings—to spend any extra cash tracking their two-timing partners. In other cases, would-be philanderers have decided that divorce is not worth the financial risk. “There’s a phrase: ‘It’s cheaper to keep her,’ ” says one veteran gumshoe. “Perhaps they’re giving their marriage a second bite at the apple.” Even those who are still cheating are pinching their pennies. “It’s typically a married individual who hooks up with a single person and they end up at the single person’s house or apartment,” says another investigator. “Now they’re at somebody’s house mixing up a box of mac and cheese instead of being out on the town ordering a steak.”