ALDN-326 This bitch beast, Reiko Kobayashi

The stepfather was troubled... why couldn't he have a precious heir?
One day, he accidentally witnessed his son and daughter-in-law having sex, and the stepfather became convinced.
So... his son lacks 'manly' ability.
The stepfather decides to impregnate her instead of his son.
At first, Reiko desperately resisted with reason...
But soon, her instincts awoke, and in front of her stepfather, she became a 'female'.
However, her husband caught sight of this scene.
What action did the enraged husband take?
A family that defies common sense is tightly bound by the bond of 'female' and 'male' in this abnormal love story.
Just what will be the outcome this time...?