His brother asks for a blowjob as a birthday present

This boy's birthday has arrived and his sister doesn't know what to give him. They start talking together on the couch and reach a very morbid agreement because the brother asks aunt for a blowjob. She thinks about it a little at the beginning and makes an innocent face, like "I don't make those sluts." But when he touches his brother's hot cock, all prejudices are gone and he soon gets his tail in his mouth. It gets so hot that it is then placed on all fours on the couch to start fucking it forgetting that they are brothers.