YOU SAID:
kitty ate my sisters eyeballs
INTO JAPANESE
キティは私の姉妹の眼球を食べました
BACK INTO ENGLISH
Kitty ate my sister's eyeball
INTO JAPANESE
キティは私の姉の眼球を食べました
BACK INTO ENGLISH
Kitty ate my sister's eyeball
Okay, I get it, you like Translation Party.