Michelle, 40, was enraged when she learned estranged hubby Michael, 45, was seeing Samantha Bunn, 31, below.

And a source said: “She continues to plague Samantha with vile and disgusting messages.”

Michelle denies the claims.

The undies queen was also slammed for “testing the patience of a saint” as a bitter war of words raged over her marriage split.

An Ultimo insider launched an astonishing attack on the lingerie tycoon while defending Mone’s ex Michael and his new girlfriend.

Michelle was even accused of bombarding Samantha, 31, with “vile” texts, while allegedly starting her OWN new relationship with a mystery man.

Last night the millionaire mother-of-two strongly denied the claims.

But our source said: “For years Michelle has happily painted herself as the star of the Ultimo show, and the fiercely private Michael was glad to play the silent partner.

“Even recently as she strives to publicly tear his character apart, Michael has been determined to keep a dignified silence — but Michelle would test the patience of a saint.”