Ask others you know.
Word of Mouth they say is the Best advertising. So, ask everyone you know, who gives the best massage in town? Then make a list of the places they recommend and give them a call.
It would also depend on what sort of massage or treatment you wanted her to recieve. If there is a particular technique, like CTS, NMT or MFR that you want her to try, then that would also narrow down your search.