One night and two days of 1 night and left alone by my wife's sister who suddenly came over

"I'll flush my back." "Oh, sister-in-law!?" Her big breasts, with their distinctive large areolas, stick to Takuya's back. The soft feel quickly makes my lower body react. (Why did this happen...) It all started when my sister-in-law Ayaka suddenly came along. It's been a week since my wife got pregnant and returned to her parents' house. Takuya enjoys living alone for the first time in a while, but he is beginning to feel lonely. At that moment, Ayaka came to help out with her housework... (Is this your true purpose, sister-in-law?) By the time I realized it, there was nowhere to escape...