Ask her to define what music is, then prove that your songs don't fit the description.
Simple, music cannot be defined but by a vary broad and extemely unspecific manner. Just look at what Google has to say on the matter.
Definition of Music
That alone should tell you something. Music can be defined by so many different standards. But when you really get down to it, it's artistic value is nothing but perception. We all see things differently. Music, because of this, is whatever we make it, and whatever we want it to be. One of the loosest definitions I could find was pretty much saying organized noise and maybe vocals. I'm positive your tracks stay within those limitations. Your songs ARE "real" music.
And remember, perception is reality.