Due to sudden bad weather, I took shelter from the rain with my wife's younger sister. When we were alone... she showed me her underwear, begged for a kiss, and secretly tempted me! Then, when we ended up sleeping in the same futon in the shape of the kanji for 'river,' it happened again... Even though my wife was nearby, she suddenly got close! We pressed our sweaty skin together while she relentlessly demanded my cock! In the cramped, steamy space, we had intense bareback sex! I kept thrusting my hips as the girl rode me, and I filled her up inside. It seemed like she still wasn't satisfied, so when she suggested a second round...
