YOU SAID:

My colleagues mother is in a relationship with me. That makes my colleague very frustrated due to the fact that I tell him all the nasty details.

INTO JAPANESE

私の同僚の母親は私と関係があります。それは私が彼にすべての厄介な詳細を言うという事実のためにそれは私の同僚を非常に失望させます。

BACK INTO ENGLISH

My colleague's mother has a relationship with me. It makes my colleagues very disappointed because of the fact that I tell him all the nasty details.

INTO JAPANESE

私の同僚の母親は私と関係があります。それは私が彼にすべての厄介な細部を言うという事実のためにそれは私の同僚が非常に失望させます。

BACK INTO ENGLISH

My colleague's mother has a relationship with me. It makes my colleagues very disappointed because of the fact that I tell him all the nasty details.