Makina, the younger sister, took advantage of her brother's eternal virginity, showing him her panties to extort pocket money. The brother's frustration built up as Makina always stopped just short of full exposure. When he finally saw Makina's vagina, he lost all reason and inserted his penis. The raw sensation of the vaginal walls was too much; he went into a frenzy, ejaculating inside her. And it didn't stop at once... Chasing after his fleeing sister, he penetrated her multiple times in the hallway, in the bathroom! Even when their parents came home, he fucked her right on the brink of getting caught! Though he was her brother, Makina's mind was pushed to the edge of collapse from a whole day of raw penetration.
