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The Real Housewives Of New Jersey

Dina Manzo on Why Teresa Giudice & Melissa Gorga Just Can't Get Along

By Alison Schwartz

06/27/2011 at 04:00 PM EDT

Former The Real Housewives of New Jersey star Dina Manzo has a theory about Teresa Giudice's rocky relationship with fellow housewife and sister-in-law Melissa Gorga. Their rivalry, she says, is actually a result of love.

"It all stems from the love of a brother and sister," she told Andy Cohen on Watch What Happens Live Sunday night. "So they need to step back and all realize that [the drama is] a lot of BS."

Manzo, 39, says Giudice's brother Joe, Gorga's husband, "admires" his sister – but that high regard backfires, as it did at the christening ceremony of the couple's son.

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The family feud erupted after Joe called his sister "garbage" at the affair, which was hosted by Gorga. And when it comes to drama, Manzo says, "girls can be bitchier."

"She just blurts it out," she says of Giudice. "There's no filter, so that can piss people off."