There are different "whites" even the brighest white (optic white) will vary from vendor to vendor. Not a big deal....it will add visual interest. Heck, mix it up with optic whites and cream whites but, yes, get her involved.perhaps pick up some fat quarters and do a test sew. Make a table runner! Also, your quilt shops can be very helpful with ideas. Get them involved in helping you with ideas, patterns etc.
sandy