YOU SAID:

They snuck behind the house and quickly removed each other's clothes.

INTO JAPANESE

彼らは家の裏に忍び込み、すぐにお互いの服を脱ぎました。

BACK INTO ENGLISH

They snuck into the back of the house and quickly undressed each other.

INTO JAPANESE

彼らは家の裏手に忍び込み、すぐにお互いの服を脱ぎました。

BACK INTO ENGLISH

They snuck into the back of the house and quickly undressed each other.