In the midst of a secret insertion within the family gathering, mother and daughter's mucous membranes entwine beneath her skirt. As she becomes aroused by the permeating scent of lust, the mother whispers, "It's not good... my voice might give us away." Their bodies ache with anticipation under thin sheets, pushing them further into danger. Despite the risks, they continue their daring hidden sex acts right next to father, reassuring each other that he won't notice if they take things slow.

家族団らん中に始まる極秘挿入。スカート越しに母子の粘膜が絡み合う。「今はダメ…声出ちゃう」薄布の中を漂う淫臭に発情した母親がこっそり連続イキ。ギリギリの状況に身体が疼き出し、更に危険な状況に飛び込んでいく二人。「ゆっくりならバレないから…お父さんのそばでも大丈夫よ」父の目を盗んで大胆不敵な隠れハメセックスが止まらない！