YOU SAID:
I will have, what she's having
INTO JAPANESE
私は、彼女が持っているものを持っているでしょう
BACK INTO ENGLISH
I will have what she has
INTO JAPANESE
私は彼女が持っているものを持っています
BACK INTO ENGLISH
I have what she has
INTO JAPANESE
私は彼女が持っているものを持っています
BACK INTO ENGLISH
I have what she has
That didn't even make that much sense in English.