当我在水中和姐姐做股间性交时……我最终教了姐姐游泳，因为她讨厌游泳课。看到她不断长大的乳房，我忍不住勃起了……

水姿の妹と素股してたら…。水泳の授業が嫌いな妹に泳ぎを教える事になったボク。成長中の胸の膨らみに堪らず勃起して…

當我和我姐姐在水中進行腳間性交時......我最終教我姐姐如何游泳，因為她討厭游泳課。看到她不斷長大的乳房，我忍不住勃起

When I was doing intercrural sex with my sister in the water... I ended up teaching my sister how to swim, because she hates swimming lessons. I couldn't help getting an erection at the sight of her growing breasts...