Actually I have to agree with hijokai in his original post. You're going to have other issues, sexual and relationship wise, if your woman feels the need to fake orgasms.

Now, if this is a casual relationship, go with the flow and don't squabble.

On the other hand, consider that YOU are the reason she is faking it. In my humble opinion, you need to give your partner permission to be able to say, "I just can't cum right now - let's just work on getting you off".

Face it, the male animal wants to fuck. End of story. The female animal wants to be wooed and intellectually stimulated. It's harder and takes longer to do the wooing stuff and easier to just fuck to get the guy off. Get your relationship in order so that it's OK to just fuck, then when you have time get out the candles and soft music and go down on her until she passes out from orgasm.

Pay now or pay later. But you gotta pay.