When a young wife who came to a mixed bathing hot spring with her husband was shown a huge erect penis, the young wife, who had only known her husband's small penis until now, could not take her eyes off the huge penis she was seeing for the first time, and revealed her lewd nature that she had never realized! Once her body was on fire, she reached out to seek a cock other than her husband's inside her, revealing her true nature as a female and going wild with instinct!