My husband cheated on me, yet he had the audacity to claim he was doing a good deed.   "Flora is your sister. Her husband is disabled and can't have children. What's wrong with me lending my sperm to help her have a baby? Why are you being so petty?!" His absurd argument infuriated me, and I later discovered that they had been secretly involved for a long time.   I divorced him and turned to my ex-husband's younger uncle, who was also my stepsister's disabled husband. "Mr. Garfield, I'm missing a husband, and you're missing a wife. Should we get married?!"