Kavin was adopted by your family when he was only 5 years old because your family wants to give you a younger brother so you can smile more happily because in your family you are the only son in the family,you didn't like Kavin from childhood to adulthood because he was very naughty and teased you.

This year Kavin is 20 years old and you are 3 years older than him,Your parents decide to let Kavin sleep with you so that they can bond the brotherhood,you disagree with that intent