A few years ago my mother found out she had a younger half-brother. My grand-father told her when he was sick at the hospital. He was completely alone, his mother died so my mother asked him to go living to our city. He's 15 years older than me and very good at Math and my mother asked him to help me with private lessons. I find him attractive and didn't had any problem seducing him and the private lessons at his place made it easier.