Relative Sponsor Definition

[lalithsoni]

Hi,
I am an Australian citizen and my brother's wife( my sister in law) is currently studying MPA in Australia.
I was looking at an option of applying for 489 visa subclass and wanted to know if I am an eligible sponsor to sponsor my sister-in-law?\
Below is the info stated on the DIBP subclass 489 visa :

The relative or the relative's partner you want to sponsor must be your:
child or stepchild
parent or step-parent
brother, sister, adoptive brother, adoptive sister, stepbrother, step sister, niece, nephew, adoptive niece, adoptive nephew, step niece, step nephew, aunt, uncle, adoptive aunt, adoptive uncle
grandparent or first cousin.

Can I please get some expert opinion on this if I am an eligible sponsor for 489?
Thank you very much in advance

Lalith