YOU SAID:

My mother is my brothers father

INTO JAPANESE

私の母は私の兄弟の父です

BACK INTO ENGLISH

My mother is the father of my brother

INTO JAPANESE

私の母は私の兄の父です

BACK INTO ENGLISH

My mother is my brother's father

INTO JAPANESE

私の母は私の兄の父です

BACK INTO ENGLISH

My mother is my brother's father