Have you asked on a regional board closer to where the operates (Phili board perhaps)?

 
Unless she is just offering the massage, then, assuming no reviews or recommendations for locals, yes be worried.

indicating that sexual services are on her menu, then the risk is that this session may be massage only, at her discretion.  Years ago, I saw a few ladies that advertised as Massage therapist, and it was a situation where they would decide AFTER they meet you if any or all sexual activities will be on the menu.  If you're okay with that level of uncertainty, then go ahead and roll the dice.  If you want to spend your money on a sure thing, then go elsewhere.  

 
The caveat here is whether or not she has reviews that clearly indicate sexual services were received by the reviewer.  Look for any negative reviews that said the reviewer was led on to believe there was more on the menu than what they received.

Why would a massage therapist require references? Why don't you just come out and say what you're actually looking for?