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My Sister's Blowjob Can't Possibly Feel This Good Azu Amatsuki

Forced to abstain from masturbation due to fertility treatments, the husband reaches his breaking point, overwhelmed by pent-up desire. At that moment, his sister-in-law, Azu Amatsuki, who lives with them, suddenly whispers, "Big brother, want me to make you feel good with my mouth?" Surprised and conflicted, he knows full well how skilled Azu is at blowjob, and gives in to his honest desires. Instantly, Azu pulls down his underwear and begins sucking him off. Despite her usual cold, tsundere attitude, her technique is as expert as a professional sex worker's, making him climax uncontrollably in no time. Initially suspicious that she's mocking him, he gradually finds both his body and mind melting under Azu's oral mastery. Soon, mere blowjobs aren't enough—using the excuse of preserving sperm, their encounters evolve into edging sex. Though guilt-ridden toward his wife, he can't resist indulging in this forbidden affair with Azu. His overwhelming urge isn't driven simply by infidelity or incest—it's pure, raw lust prevailing. The story captures his surrender to desire as he fully embraces this taboo relationship with Azu.