That JAV

Yumi is a wife who suffers from sexlessness with her husband. One day, Yumi discovers that her husband is cheating on her, and on the advice of a friend who had the same problem, she decides to start "yoga to improve her body condition = mankatsu". As Yumi's body changed, her husband became more active in their nighttime activities.... She thought she could finally get rid of the sexless relationship she had longed for, but the effects of the "mankatsu" make her nephew go into heat! Yumi's body has become so sensitive that she can't resist her nephew, and he even teaches her to squirt her first time....