My sister-in-law and I have a secret that I can never tell my wife. - If it were discovered, it would be an affair that would destroy everything...but I love both of them. - My wife and sister-in-law love me...even though I know it in my head, I can't stop living a stressful life. - Thrill increases excitement, and jealousy fuels sex. - Besides, my sister-in-law has a lewdness that my wife doesn't have. - She is the best woman to have an affair with. - I wish this wonderful sex life could last forever...