YOU SAID:

my mother told me to go get my brother

INTO JAPANESE

私の母は私の弟に行くように私に言った

BACK INTO ENGLISH

My mother told me to go to my brother

INTO JAPANESE

私の母は私に私の兄弟に行くように言った

BACK INTO ENGLISH

My mother told me to go to my brothers

INTO JAPANESE

私の母は私に私の兄弟に行くように言った

BACK INTO ENGLISH

My mother told me to go to my brothers