YOU SAID:

I have a sister who hate me and my brother cat.

INTO JAPANESE

私には私と弟の猫を嫌う姉妹がいます。

BACK INTO ENGLISH

I have a sister who hates me and my brother's cat.

INTO JAPANESE

私には私と兄の猫を嫌う姉妹がいます。

BACK INTO ENGLISH

I have a sister who hates me and my brother's cat.