VENU-818 A sudden visit from my wife's sister left me unable to resist for an entire night and day

I was enjoying my long-awaited solo living. My wife had gone back to her parents' place because she was pregnant. Then, my sister-in-law Yukimi came to check on me alone at home. She looked fed up with the messy house, and I took the opportunity to invite her in... Yukimi suddenly gave a suspicious smile and started saying strange things. "The rate of men cheating is highest when their wives are pregnant. Could it be that you're pent up?" she said, looking at me like she was targeting prey…