I would definitely ask her for more specific directions: pictures of similar quilts she can find; fabric she's like -- look on the internet and send you the links; describe the particular pattern she would want. Take her with you to a quilt store!
I'm betting the quilt she really wants *will* have some creams/off-whites in it, but to save you the frustration and hurt of her not loving the finished project, put the effort of the fabric selection on her.
Jan in VA