The sentence seems to be: "妻に黙って外買いにいくなんて、ダメよ" (Tsuma ni damatte sokubaikai ni ikun ja nakatta, better).
Abstract: The colloquial Japanese expression “Tsuma ni damatte sokubaikai ni ikun ja nakatta” (I shouldn’t have gone to the flea market without telling my wife) operates as a seemingly trivial confession of domestic deception. However, this paper argues that the phrase serves as a sophisticated linguistic microcosm for examining post-bubble economic guilt, the performance of hegemonic masculinity in retreat, and the subversion of traditional uchi-soto (inside-outside) social dynamics. By deconstructing the grammatical construction of regret (~nakatta) and the semiotics of the sokubaikai (flea market) as a liminal space, this draft posits that the speaker is not lamenting an act of consumption, but rather mourning the loss of an autonomous selfhood that modern Japanese domesticity has rendered obsolete. tsuma ni damatte sokubaikai ni ikun ja nakatta better
必要なら、あなたの具体的な状況（どのような即売会か、出費や嘘の程度、相手の反応）を教えてください。状況に合わせた文例や謝罪メッセージ、対話の進め方を作ります。 By deconstructing the grammatical construction of regret (
Mari smiled, small and real. “Show me,” she said. small and real. “Show me