Dear Alex:
I know it has been a while so how have you been? With respect to the prospective reference, a good rule of thumb to use since you have been in the business for a while is try to stay away from those who wouldn't have a website of their own. At this point, you can almost assume that she could be the concomitant of a BP girl, because all she gives you is a phone number. Also since you asking the question on TER, it is almost a cinch that very few people have seen her if any. After all, the site that we are own is the equivalent of car and driver magazine in terms of screening and information. Ask for a second and a third reference of someone who would have more of a web presence.
Or it is a long shot, but if she is willing ask her if she has any hobbyist in common with you and go that route? I am sure that you will make a sound and cerebral choice but in any event get more information.