I would not fix unless the quilter OKAYS it, and then make sure you charge $10 an hour, including the time it takes to rip, sew and re-press the top!
If she wants you to just do 'the best you can' I would charge extra. It's going to take you additional time to manipulate the fullness.
If you have any, I would add a layer of a fluffier batting just on the borders, and quilt a piano key easing the fullness as you go.
Just located this video. The woman is a genius!:
http://www.youtube.com/watch?v=lPHsBYa36W0