She Kept On Luring Me To Temptation Even Though My Wife Was Nearby, With Hard And Tight, Relentless Piston-Pounding Sex Mizuki Yayoi

My brother and his wife went on a trip, so I ended up looking after my niece, Mizuki. Mizuki had always been attached to me, and she hugged me happily when we reunited. In the living room, she sat on my lap, clinging to me joyfully, but unlike before, my niece had grown cute, and I unexpectedly got an erection. Noticing the change, my niece, instead of looking disgusted, smiled and pressed closer, then secretly inserted my cock and started thrusting slowly, so my wife wouldn't notice.