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

(Maybe your sister-in-law invites me?) Takuya has come back to her pregnant wife and is enjoying living alone for the first time in a while. Suddenly, my sister-in-law Yuka came to help out with her housework... Perhaps on purpose, her breasts and panties are frequently seen. Yuka is strangely sexy, but her cock gets erect, despite her confusion. Furthermore, when Yuka saw the scene, she said, "To prevent infidelity, I'll let you out."