ATID-280 Prisoner of the hole behind Yu Konishi

On the anniversary of her mother-in-law's death, Yuko returns home with her husband. After visiting the grave, when her husband goes out for drinks with local friends, her father-in-law attacks Yuko and crosses the line. The next morning, while her husband is too drunk to wake up, her father-in-law tastes even Yuko's butthole.