Mistaken Identity: Hookup With Girlfriend's Sister

Struggling to keep his hands off his girlfriend during her period—who promised him unlimited sex next week—the protagonist is enduring a frustrating wait. Upon entering his home one day later and spotting a stunningly naked figure lounging about the place with an alluring physique that matches his lover's description perfectly... he loses all restraint. Without a second thought or hesitation regarding who it might be this time around, he dives headfirst into passionate intercourse. The initial rush of pleasure quickly gives way to a jolt of mortified realization: it isn't his girlfriend after all! It's her beautiful younger sister! Overwhelmed with guilt and immediately apologizing for his blunder during their intense session, he braces himself for a fit of anger from the unexpected encounter. However, instead of fury, the sister seems utterly unfazed by the mix-up; in fact, she appears to be craving more. Her response isn't resentment but an eager desire to drain every last drop of his seed, promising an unforgettable climax following this hilarious mistake.