Its not all that far fetched. In something like her position, I'd be begging for a body double in order to get some freakin' privacy every once in a while.
That stated, they're definitely running far afield with this one, and need more evidence than a couple of folks squinting at a picture and speculating about her looks.
I think most people assume that its all about the money and fame and she really does not care about Trump. Maybe she does not have a very romantic relationship with Trump but I think this is more than money, I believe Melania may actually be settling into her role and liking it.