YOU SAID:

I had left my dog for my wifes baby sister

INTO JAPANESE

私は妻の妹のために犬を残していました

BACK INTO ENGLISH

I was leaving the dog for my wife's sister

INTO JAPANESE

私は妻の妹のために犬を預けていました

BACK INTO ENGLISH

I was leaving the dog for my wife's sister.

INTO JAPANESE

私は妻の妹のために犬を預けていました。

BACK INTO ENGLISH

I was leaving the dog for my wife's sister.