It is just like setting the wolf to keep the sheep.

A Russian teacher was sentenced to four years in jail for having sex with a 15 year-old boy while tutoring privately in his first class. It was caught by the boy's mother who is also the teacher's friend.

Kostya Dyukov, a 15-year-old boy from St. Petersburg, was from a rich family. His father was an oil tycoon. Lacking interest in learning, he often displayed photos of beautiful women as well as expensive cars on social media. Finally, his mother decided to invite her 35-year-old friend Natalya Nikandrova as a tutor for him.

The first lesson of Nikandrova was neither mathematics or English, but "health education." She seduced the boy to have sexual relations. And when the two had sex in bed, they were caught by the Dyukov's mother.

The mother was too angry that sue Nicholzova at the Moscow District Court. Nikandrova admitted the crime and then was sentenced to prison for four years.