YOU SAID:
We love a snatched sister
INTO JAPANESE
奪われた妹が大好き
BACK INTO ENGLISH
I love my robbed sister
INTO JAPANESE
奪われた姉が大好き
BACK INTO ENGLISH
I love my sister who was robbed
INTO JAPANESE
奪われた私の妹が大好き
BACK INTO ENGLISH
I love my sister who was robbed
That didn't even make that much sense in English.