Yep.  Once.  With my ex-wife.  

It's a very long story.

ain't simultaneous faking just the bomb?!?  Ever had a drop dead gorgeous provider just lie there and obviously fake  (panting breathlessly "fake me baby! fake it to me! ahhh, Ahhh, AAHHH!")?  Looked like so much fun I just had to fake back, and I think together we achieved that wonderful mystery known as simultaneous mutual orgasmic deception (SMOD).  Gotta admit though, no matter how much Viagra, I've never been able to go round 2 in this situation, to pull off a multiple fake in one session (MSMOD or MFOG...can we add these to the glossary?)

I can honestly say NO to that question.

After giving this some more thought,I think the only reason
I would fake an orgasm,would be to get out of a bad session.
Luckily,I haven't had any sessions that bad since finding
TER.
Women can have fake orgasms and alot of time we don't know
the difference,but it seems to me that if I were to fake an
orgasm, it would be obvious. Close inspection of the cover would reveal a full or empty tip.
I wouldn't even bother, I would just pull out and end the
session.

I sometimes imitate the involuntary contractions that accompany an orgasm, because it provides a different kind of stimulation to a woman. After I did this fairly early during one session, the provider asked "Did you come already?"

Gave us something to laugh about.

And the provider NOT know about it??

I had a strong sensation once with a provider where I THOUGHT I did have an orgasm but I didn't.