YOU SAID:

oops I'm in my childrens' pants

INTO JAPANESE

おっと私は私の子供のズボンに

BACK INTO ENGLISH

Ooops I was my kids pants

INTO JAPANESE

おっと私の子供の頃のパンツします。

BACK INTO ENGLISH

Oh my kid's pants.

INTO JAPANESE

ああ私の子供のズボン。

BACK INTO ENGLISH

Oh, it's my kid's pants.

INTO JAPANESE

ああ、それは私の子供のズボンです。

BACK INTO ENGLISH

Oh, it's my kid's pants.