Three years into marriage, we finally welcomed the child we had long awaited. However, after the baby's birth, my wife began feeling unwell and grew increasingly dissatisfied with daily life. One day, I had the chance to reunite with Ruisa, my wife's mother. In truth, Ruisa and I shared a hidden past, and currently, she and her daughter were estranged. Meeting again after six years reignited old emotions. As memories of the past resurfaced, conflicting feelings—those of a mother longing for her daughter, and a husband torn between loyalty to his wife and child—intertwined, and we made a decision. We began exploring a new kind of relationship with my mother-in-law. Awakening to physical pleasure after six years, I couldn't stop myself from desiring Ruisa.