Real Housewives of New Jersey star, Danielle Staub, keeps getting in to very hot water over her numerous sex tapes.

Breaking Celebrity News has learned exclusively that Staub’s ex, Stephen Zalewski, is suing the reality TV star for defamation of character and harassment.

In the suit being filed Thursday in Morris County Superior Court in New Jersey, Zalewski claims Staub’s comments on the show regarding the sex tape are outright false.

EXCLUSIVE PHOTOS: NJ Housewife Danielle Staub -- Partying [expletive] Star With New Love

The suit says that in the episode titled “Play at Your Own Risk”, Staub claims that Zalewski had filmed the sex tape without her knowledge or consent.

Zwaleski’s attorney, Nace Naumoski, tells us exclusively that Staub absolutely knew about the sex tape - and had even filmed parts of it herself!

Additionally, Naumoski says, they have emails & texts messages that show Danielle knew about the tape & was actually all for it!