Please don't treat this as legal advice, but for what it's worth ...
It's true that (subject to the terms of your contract with her) the photographer's photos, even though they are photos of you and were commissioned by you, are her original artistic works and that, therefore, copyright in the photos vests in her. Owning a the physical photograph does not necessarily legally give you the right to copy it, much like owning a music CD doesn't give you the right to stand on a street corner handing out free copies.
I presume that if you purchase the "copyrighted CD" (this is a confused way of phrasing things, as the copyright doesn't actually subsist in the CD but is a personal right that attaches to the author of the copyrighted work), the copyright will vest in you and you will be able to do basically whatever you want with the photos, subject to whatever limitations exist in American law.
All of this is pure legal theory, anyway. I've never seen a photographer go after a married couple for copying wedding photographs for purely private purposes.
I know there is also a "fair use" exception to copyright in American law (there isn't in Australia) which might provide you protection from infringement for certain types of copying, but I'm not qualified to comment.