To prepare well for the upcoming university entrance exam, my younger brother asked our parents for permission to stay in the city at our older brother's place for a few months, hoping to be tutored and assisted by his girlfriend - a beautiful and talented girl who is currently a student at a prestigious university.
The older brother is very kind, always reminding his girlfriend to frequently tutor his younger brother, while the girlfriend dresses very revealingly and casually at home, especially while teaching. There have been many times when he has to try to control his little boy after accidentally seeing his sister's sensitive area.
But the fire near the straw also burned for a long time, during a fateful tutoring she unintentionally made a very suggestive pose on the bed, exposing her panties and chubby buttocks, this time his cock couldn't stand it anymore, so she boldly quickly tucked her little boy inside from behind, making her unable to reflex.
Thinking that he would curse a little later, she apologized in a hurry, but no, on the contrary, she wanted him to continue doing it to her again.
