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

It's been a week since my wife, who has been in her final month of pregnancy, returned to her hometown. My wife's sister, Ranka, came to cheer Shota, who was living a lonely life alone, praying for her wife's safety. "Since she got pregnant, you haven't had sex with that girl, have you? I thought it might be piling up," Shota can only be confused by Ranka telling Akesuke. Her beautiful, beautiful breasts and brown-skinned gal body with excellent figures are in no way possible and she is fucked down...