My Wife's Sister Boldly Tempts Me and Makes a Cuckold of My Wife. Ayane Sezaki.

A peaceful newlywed life at my wife's family home. That happiness was shattered in an instant when my sister-in-law came to visit. Under the same roof as my beloved wife and mother-in-law, my sister-in-law's relentless seduction knows no bounds! Not just direct attacks, but showing off sex with her lover! In the bathroom, in the bedroom where my wife sleeps beside me, I felt my sanity crumbling with a crash... And after crossing that line, I pathetically became a slave to my sister-in-law, body and soul.