Housewives gone wild!

On Thursday's episode of "The Real Housewives of Miami," Joe Francis claimed he slept with castmember Joanna Krupa ... AND her sister Marta!

Joanna didn't take well to the claim, and when the "Girls Gone Wild" creator went into more vulgar detail, the supermodel went ballistic. Watch what happened:

In case you're wondering why they're all half-naked, they were attending Lisa Hochstein's lingerie charity benefit (only in Miami!).

While Joanna vehemently denied hooking up with Joe, Marta could only laugh it off. Joe isn't Joanna's only problem at Lisa's party. On this Sunday's special episode, she gets into a catfight with castmate Adriana Moura.

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