Teresa Giudice better watch her back, because Rosie Pierri is out for blood!

The feisty fire-cracker goes on an angry and expletive tirade about Teresa to her cousin Kathy Wakile in an explosive clip from the upcoming episode of the Real Housewives of New Jersey­ and Breaking Celebrity News has the details.

"I haven't seen you all night, what's going on?" Richard Wakile asks his wife at a party.

"I had a thing with Teresa," Kathy replies in frustration.

"I'm stepping off," she continues, referring to