YOU SAID:
Me sisters spoiled rotten.
INTO JAPANESE
私姉妹は腐って甘やかされました。
BACK INTO ENGLISH
My sister was rotten and spoiled.
INTO JAPANESE
私の妹は腐っていて甘やかされていました。
BACK INTO ENGLISH
My sister was rotten and spoiled.
That didn't even make that much sense in English.