She married a very wealthy entrepreneur/consultant in 2020, which accounts for most of her "new" wealth. From the article you linked:
"The surge in the couple’s wealth was first reported by the Washington Free Beacon on Monday.
The financial gains came from Mynett’s two businesses, a Santa Rosa, Calif.-based winery and a venture capital firm headquartered in Washington, DC."
Still potentially troubling that she married a venture capitalist and political insider, but I don't see a change in her voting record. She just appears to be a class traitor (meaning she betrays her class - wealthy - by supporting progressive economics).
Definitely something to keep an eye on though. I have no problem with any sort of investigation into fraud, as long as all members of congress, in both parties, are subject to the same scrutiny.