妻に先立たれた義父と同居を始めた川口夫婦。夫の不在中…義父から’10秒だけ’の挿入を懇願されると、まさかの相性ドストライクすぎて…マンコ即イキ絶頂即中出し！ダメダメと分かっているはずなのに…快楽を求めて腰を振り合う激ピストンッ！10秒…もう10秒と何度もおかわり中出し！激硬チンポで何度も突きまくる…！禁断の近親SEXは理性飛ぶほど、気持ち良すぎた…！

The Kawaguchi couple began living with the father-in-law, whose wife had passed away. While the husband was away, the father-in-law begged him for just 10 seconds of penetration, and to their surprise, their compatibility was so perfect that she instantly orgasmed and he immediately ejaculated inside her! They knew it was wrong, but they thrust their hips together in a furious piston-like motion, seeking pleasure! 10 seconds… just 10 seconds more, and he ejaculated inside her again and again! He thrust into her again and again with his rock-hard cock…! The forbidden uous sex was so pleasurable that it made them lose all reason…!