correct use of pronoun

[Unregistered]

On a report, I wrote the following sentence:

• One of Ronnique’s older siblings resides in the same foster home as she.

My supervisor stated that I needed to use her instead of she at the end of the sentence. Who is correct?

 

[Anglika]

"her" is correct, unless you end the sentence with "as she does" (which actually sounds better).