The phrase most likely means "I shouldn't have gone to the convention/sales event without telling my wife," expressing colloquial regret about attending a (probably hobby-related) event while keeping it secret from one's spouse.
この作品は、タイトルどおり「秘密と後悔」を軸に据えた短編ドラマ／エッセイ的な読み物で、日常の些細な選択が人間関係に及ぼす影響を鋭く描いています。作者の筆致は控えめながら感情の機微を逃さず、読後にじんわりとした余韻を残します。 tsuma ni damatte sokubaikai ni ikun ja nakatta hot
: In the second episode, Yumiko disguises herself and attends a "naughty cosplay event" (a sokubaikai The phrase most likely means "I shouldn't have
and adult genres, focusing on themes of marital dissatisfaction, secret double lives, and betrayal. or more details on specific episodes focusing on themes of marital dissatisfaction
The Regret of a Silent Excursion