My regular provider never has an orgasm , even with vibrator . It bothers me that she doesn't receive  the same pleasure from our time together . Any thoughts appreciated !

There are a couple things that may be going on, and you may not want to face some of the answers:

1. It's strictly a job for her, she doesn't come with any clients.
2. You just don't do it for her. Sorry!
3. Are you pressuring her to have an orgasm? Pressure will kill enjoyment.
4. Are you relaxed and enjoying yourself? She'll be more mentally focused on fulfilling your desires before she can relax enough to have an orgasm.
5. Physiology. Orgasms may make her pussy too sensitive to handle her full slate of clients, so she actively avoids having one. Or maybe it takes a lot of work for her to orgasm and she doesn't want to subject her clients to that. Many women don't get there as easily as most guys.
6. Psychology. She may feel some shame or guilt about taking pleasure in providing, or is otherwise mentally unable to "let go" and fully enjoy the encounter.  

The best mindset to have going into this is to 1. relax, that it's 2. built around *your* pleasure, and that 3. there's more enjoyment to be gleaned from a sexual encounter than simply the big O (i.e. enjoy the ride, not just the destination). She may find the most satisfaction in knowing that she's satisfied you. If in doubt, give her a nice foot massage.

Ya see women folk are different than us fellas. Besides the obvious physical difrences they are just wired differently, it's like comparing typical house wiring to a three phase delta or wye circuit. Maybe that's a bad analogy but a few folks here may get that one. First of all a lady even a pro is  not a orgasm robot. Where us fellas well to be blunt we pretty much are. I ever tell ya'll folks about the worst pussy I ever stuck my dick in? Guess what I busted a nut!

Seriously though we've all seen gals that we didn't get to climax. It happens just like in civvie sex the gal don't always get hers. We've all had a gal looking at us like WTF? I thought nice guys finished last lol!! Lowell shit I thought it was a race and I thought I won!

Ok now I'm gonna be serious as promised. From my experience the most orgasmic gals I've been with here have been the ones where there was some kind of actual "chemistry" or whatever, the gals ya meet where you would have gotten along well meeting in real life versus the hobby world. Takes a lot of luck to find those gals but it happens, your regular provider is comfortable enough with you because your a safe client, and that's a good thing. But a lot of it boils down to chemistry that is beyond a comfort level. It just is what it is, no fault of yours or hers, some gals can climax if a gnat lands on her lady parts they are just wired that way (Thank you God!!!!) some gals while enjoying the ride (and the pay day) have to have a emotional connection ( and it don't mean she's in love or some crazy shit) to the fella doing the pushing to get theirs. No rhyme or reason to it. Just enjoy your self and as always treat the gals with respect.  
The only advice I can give and it ain't much is make her laugh. You can't force chemistry and you'll screw it all up if you try, been there done that holy shit it was awful, but sincere genuine laughter is one hell of an aphrodisiac. Hope that makes sense I'm writing this as a  try and chat up a hot bar tender between rounds, the make a gal laugh rule carries into civvie land too.

Who is paying who again? Would you feel better if she faked it like 99% of the other providers do?
 

Spot on!  

Did you ever HAVE to use lube (for vaginal) sex with a woman who was into you? Most likely, NO.
You are paying for the fantasy that she likes you. Relax and let her do her job.

Believe it or not, some women never orgasm.  They just have not unlocked the potential of their bodies.  Some of us can't stop the internal chatter of our own minds to be present enough to orgasm.  Some of us just don't want to give you the pleasure of seeing us orgasm so we block it.  Some women especially those in the lifestyle may have had sexual abuse/assaults in their life time and now just don't permit the connection of pleasure orgasmically with what was pain in history.  There are truly 1000 reasons why women don't orgasm and most of the time the lady has no idea that she is involved in the process.  

 I have found as I matured to harness the energy...as long as the gent/lady has reasonable skills and motivation to please, I can focus and give my body the space it needs to let go to immense pleasure.  As for the vibrator, well first suggestion is to try the Hitachi or the Symbian before making the conclusion that they don't work for her...and then let her explore her own body alone.  I still find it hard to orgasm with a vibrator in front of others especially if they have control of the device.  It is about angling the head just perfectly to hit my sweet spot and then it is about my mind letting go.  Once the lady can get all this, I truly believe that we are all multi-orgasmic.