He fucks his friend's grandson, he was just going to teach him

Grandpa trusts his former mentor to help his grandson with math. but this old man prefers to help him in another way, since he waits for the moment to stick his cock in the boy. the boy doesn't seem very unhappy with the idea of ​​fucking an intellectual grandfather, he's into older guys and it can be a unique experience. there is also the curiosity that he is a close friend of his grandfather, which makes everything much more exciting. of course, his innocent grandfather will never know anything, but what is clear is that these supposed private classes are going to last for a long time. a long time..