Me and my sister-in-law have a secret that I can never tell my wife.If it comes out, it's a relationship called adultery that will destroy everything... but I love both of them.Both my wife and sister-in-law love me... Even if I know it in my head, I can't stop living a tense life.Thrills fuel excitement, jealousy fuels sex.Besides, a sister-in-law has a lewdness that a wife doesn't have.She is the best woman for a cheating partner.I wish this wonderful SEX life could last forever.