夫が亡くなり、一人暮らしを心配した娘夫婦と同居をしている今日子。円満な家族関係を築いているが、娘婿・タクトがどうも挙動不審で気になっていると…。チ●ポがデカすぎて娘とセックスレスになっているというのだ。心配よりも密かな興奮に股間を濡らしてしまった今日子は、「2人の為」と言いながら、こっそり彼の射精奉仕をするのだった。未亡人になって以来、ご無沙汰だった肉体は昼夜関係なくタクトの肉棒を熱く求めてしまい…。

Kyoko, whose husband has passed away, is living with her daughter and son-in-law, who were worried about her living alone. While they have a harmonious family relationship, Kyoko is troubled by her son-in-law Takuto's strange behavior… It turns out his penis is so large that he and her daughter are having a sexless marriage. More than worry, Kyoko finds herself secretly aroused, and, telling herself it's "for their sake," she secretly helps him ejaculate. Having been a widow for so long, her body craves Takuto's cock day and night…