It looks as if Sandra Bullock's nightmare has no end in sight now that Michelle "Bombshell" McGee has decided she will tell even more about her 'relationship' with Jesse James ... for the right price.

"Initially, McGee sold her original story to InTouch magazine for $30,000," a magazine insider reveals, "and is now looking to make even more money by pitching additional scandalous information, including X-rated photographs, more texted messages and intimate details about what Sandra's husband likes to do in bed."