G'day Jeepman,If she has the music program on which the files were created - as a file attachment to an e-mail.
If they are MIDI - ditto (almost all modern computers play MIDIs). You can produce spectaculat MIDIs, if you know your way around MIDI - and send the full performance!
If you just want to send the 'dots' - as a scanned (say - 1-bit GIF) image of a printed sheet ... or (if you have the right music program ... or add-on) as a PDF 'image' exported from the music program (better quality than a scan)
Alan of Oz's MIDItext program lets you send and translate back text strings containing MIDI and basic ABC information ... but that is a special requirement of economically posting music to this HTML-driven site.
Hope some of this is of help.
Regards,
Bob Bolton