I work at a publishing company and live alone in a large house. My wife travels a lot for work, so we don't have much time together. What's more, every time she comes home, she makes advances on me, leaving me exhausted. Whether she knows it or not, my sister-in-law Erika often comes over to our house. That day, we started talking about everyday things and ended up talking about sex, and with a mischievous look on her face, Erika touched my crotch. As I lost my reason and began to desire her body, Erika whispered to me that if I could abstain from sex for 30 days, I could make love to her...