Remember, the most important skill an immigration officer can have is being able to sniff out a liar. While we know your lie would be in good intentions (ah, l'amor, no?) they don't see it that way. Now unless your wife has professional training in espionage, she's probably not going to be a good enough liar to get through immigration control.
Almost every time I've been through immigration, I've been asked a question that I can say with 100% certainty is on the screen in front of the agent. They're looking for your reactions to the questions just as much as they are looking for the answers.
And in an age of ever-more-connected systems between governments (particularly western governments) there's a rather good chance they already know that you two are married!! So even if your new wife practices well enough to get through the questioning and maintain the bluff, they might have the fact that she's lying right in front of them. At that point, you can kiss any visa hopes goodbye.
And even if she was good enough to bluff it, AND they don't have the connected systems, AND it never comes up in questioning, there's still the moral argument to be made. Do you want to put her in that situation? Do you want to make her lie for that?
Look, I've been in a very similar situation. During the immigration process my wife and I were separated for months (and she had our child with her too, so I was missing her too!!) But we made it work. We skyped, we texted, we called. You make it work. If you're going to spend your life with her, maybe you get 50 years together. Do you really want to risk those 50 years because you couldn't settle for 49?
Do the smart thing. Don't lie to an Immigration Officer.