YOU SAID:
my sister is convinced that she is my mother!
INTO JAPANESE
私の妹は彼女が私の母だと確信しています!
BACK INTO ENGLISH
My sister is convinced she is my mother!
INTO JAPANESE
私の妹は彼女が私の母だと確信しています!
BACK INTO ENGLISH
My sister is convinced she is my mother!
You've done this before, haven't you.