YOU SAID:
my cat went to my besties cat and my best friend's cat killed my mom
INTO JAPANESE
私の猫は親友の猫のところへ行き、親友の猫は私の母を殺しました
BACK INTO ENGLISH
My cat went to my best friend's cat, and my best friend's cat killed my mother.
INTO JAPANESE
私の猫は親友の猫のところへ行き、親友の猫が私の母を殺しました。
BACK INTO ENGLISH
My cat went to my best friend's cat and my best friend's cat killed my mother.
INTO JAPANESE
私の猫は親友の猫のところへ行き、親友の猫が私の母を殺しました。
BACK INTO ENGLISH
My cat went to my best friend's cat and my best friend's cat killed my mother.
You've done this before, haven't you.