Things to think about:
How long are the seams?
Where do the seams join up?
How big are the pieces?
Did she wash the fabric ahead of time?
What batting?
What backing?
Did she press open or to one side?
The weakest place will be where seams end, as most of us quilters do not back stitch. The more seams that meet at a T junction the better. Those joins will be stronger. If she has pinwheels where may seams come together, that will be a weaker point and also harder to quilt over.
Did she baste all around the edge? I would do this first, but with a shorter basting stitch.
If she pressed to one side, a stitch in the ditch, will provide lots of stability. I would do this on all the long seams first. Borders, sashing etc.
Then a fairly dense all over design will provide more support to the stitches. You will want to quilting design to go through each piece at least once. So if she used 4 inch squares, your quilting should be not more than 4 inches apart.
If she pieced the back, you will need to provide extra support to it on your LA. I would either resew as many of the seams as possible or perhaps all another layer of backing under her chosen one.