婚こん外がい交こう渉しょう

noun

extramarital sex; extramarital sexual relations

Formal or legal term for sexual activity outside marriage. Often used in contexts such as divorce proceedings, investigations, or moral discussions.

• 婚こん外がい交こう渉しょうが離り婚こんの原げん因いんになった。

  Extramarital sex became the cause of the divorce.

• 探たん偵ていに婚こん外がい交こう渉しょうの証しょう拠こを集あつめてもらった。

  I had a detective gather evidence of extramarital sexual relations.