She couldn't *not* know.
"Hey, we're going on a world tour"
"Cool, but can we afford it?"
"We're not paying!"
"Oh, OK" <-- said no wife ever
The question would be "who's paying and why?"
Everyone has a choice. She chose to be part of the grift, to spend the money, to live off the proceeds.
And from what I can tell, she's just as manipulative and a "people user" as he is, in a slightly different way.
They deserve each other.