ALDN-264 This bitch beast Shouta Chisato

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.
Yes... his son lacked 'manly' ability.
The stepfather decided to impregnate her instead of his son.
At first, Chisato desperately resisted with reason...
But soon, her instincts awakened, and she became a 'female' in front of the stepfather.
However, her husband caught sight of this scene.
What action did the enraged husband take? And what was the end result...?