This was what she did every time. First she teased him for hours, jerking him, rubbing his cock on her breasts, letting it in her wet pussy just for a few times, all the time promising this would be the day he would finally cum.
But then she always got too horny and jumped to ride his face. And he knew that once she had exploded on his face the whole thing would be over, and once again he would be left unsatisfied, his balls full and aching, his cock jumping, weeping out precum, left to wait to cum some other day.