This old farmer was dying and lying on his bed he told his wife he has something to confess. He told that he hadn't been all true to her through all the years. So he handed her a key, telling that there's a chest in the attic. He also told that he had put a dollar into the chest every time he had been unfaithful. A tad worried the wife climbs to the attic and opens the chest, only to find three bucks inside. Knowing the numerous trips to all kinds of farm shows her husband had made she felt very touched that he only had given up to temptation three times during all their decades spent together.
So she comes back to her husband's bed and tells him how pleased she was to find only three dollars.
To which the farmer replied, 'and I also bought the tractor'...