It has been three years since I started living with my father-in-law at my husband's parents' home. Her relationship with her father-in-law was good, and she lived a comfortable life, but her only worries were spending time with her husband at night. My husband, who ejaculates prematurely before I reach climax, has never satisfied me. Her desire continued to build up with each passing day, and one day, when she finally reached the limit of her patience, she was masturbating while the two of them were away, and she happened to run into her father-in-law, who had come back from a run... .