My friend's wife is a lewd tutor

A man who aspires to become an architect ends up being taught by his friend's wife, Chloe. However, her beauty catches her eye and she has a hard time studying. Chloe notices this and seduces the man by showing off her masturbation. If I did that, I would surely fail the exam... Feeling responsible as a tutor, Chloe comforts the man with the intention of apologizing.