YOU SAID:
I ate chicken with grandma
INTO JAPANESE
おばあちゃんと一緒に鶏肉を食べました
BACK INTO ENGLISH
I ate chicken with my grandma
INTO JAPANESE
おばあちゃんと一緒に鶏肉を食べました
BACK INTO ENGLISH
I ate chicken with my grandma
That didn't even make that much sense in English.