Showbiz
Rex Features
The singer revealed the news to her boyfriend's mum and dad on July 18, according to the National Enquirer.
Her announcement apparently prompted "a huge fight" at the Romo family home.
"Jessica and Tony thought she was pregnant and happily announced it to the family," said a source.
"The news resulted in dead silence. Then Tony's dad Ramiro said, 'You're not married. This is crazy!' Tony's mum Joan joined in, demanding, 'How can you do this to us?'"
Simpson allegedly later found out that she had made a mistake when reading her test results.
An insider added: "Her friends know she’s feverishly trying to conceive."
More: Jessica Simpson, Showbiz
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