Mrs. Stew and I are the proud parents of three children ages six and under. We love our kids, but we still look forward to those times when it is just the two of us. Date night can get expensive, however. By the time you add up the cost of a babysitter, a movie, dinner and gas . . . well, I don’t want to think about it. Here are a few ideas that we use to keep the monetary cost of investment in our marriage low.