"What?! No way... sister-in-law??" Mei-san, my serious sister-in-law who used to despise me while I lived as a dependent in their house, appeared right before my eyes when I called an escort service. What a miracle!! Once I held her weakness and gave orders, her hidden L-cup massive boobs were revealed, and the forbidden service began. "Sister-in-law... this feels better than my brother's cock, doesn't it?" As I asked and pounded her hard, she was toyed with by her brother-in-law's huge dick, and Mei-san, who was supposed to hate me, gradually transformed into a female in heat. From secret groping while the parents were away, to a designated long course at a hotel for immediate fucking! The sense of immorality became the best spice, and I intensely developed her slutty pussy. The sister-in-law, who at first cursed me as "the worst...", eventually reached a state of complete surrender, sucking my cock on her own. Sorry, bro! Sister-in-law's massive boobs are too erotic, and I pounded her neglected slutty pussy so hard that I've developed her into the perfect wife lol.