That evening they were out for a special dinner at their favourite restaurant. After dinner the woman could no longer contain her curiosity and she confessed, saying, "I am so sorry. For all these years I kept my promise and never looked. However today the temptation was too much and I gave in. But now I need to know why do you keep the bottles in the box?"
The man thought for a while and said, "I guess after all these wonderful years you deserve to know the truth: Whenever I was unfaithful to you I put an empty beer bottle in the box under the bed to remind myself not to do it again."
The woman was shocked, but said, "I am very disappointed and saddened, but I guess after all those years away from home on the road, temptation does happen. And I guess that 3 times is not that bad considering the years." They hugged and made their peace.
A little while later, the woman asked the man, "Why do you have all that money in the box?" To which the man answered, "Whenever the box filled with empties, I cashed them in."