Jessica Simpson made headlines last week when she bashed her marriage to Nick Lachey, calling him her “biggest money mistake” — and Vanessa Lachey isn’t having it!

“Vanessa is steaming mad and out for revenge!” a source told Radar Online. “She gets really pissed when Jessica talks about Nick because it’s never complimentary, but this was a real low blow.”

“She can’t believe she’s still going on about that money! Vanessa and Nick live a very modest life compared to Jess,” they continued. “Vanessa’s sick of the public digs. She wants to have it out with Jessica and remind her she’d be nothing if it wasn’t for Nick.”

nick lachey jessica simpson

Jessica Simpson and Nick Lachey.

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Days after the 35-year-old dissed her ex on CNBC’s Closing Bell, Nick — who found fame with boy band 98° — dropped another bombshell.

“The real story is that Jessica paid Nick $12 million in the divorce. That is what she meant when she said her first marriage was her biggest money mistake!” a source told the site.

“Nick got more from her than he got from his entire music career. He never needs to work again!”

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