Erika Girardi is in hot water — again.

Christina Fulton is suing Erika Girardi and her estranged husband Tom Girardi

The Real Housewives of Beverly Hills star, known professionally as Erika Jayne

is being sued by Nicolas Cage's ex-girlfriend Christina Fulton for $745,000 over claims of fraud and theft

Fulton claims Erika & her husband Thomas Girardi are responsible for breach of fiduciary duties, contract & legal malpractice.

Fulton's lawsuit claims she also "was one of the firm's clients who was unfortunately a victim of this fraud and theft."

Erika's company, EJ Global LLC — of which she is the single owner — "was created for the purpose of funneling money

Girardis were using Erika's company to avoid paying taxes — and that the reality star was aware of the scheme.

Stay on with the story what happens next we will update soon.