06/27/2011 at 02:00 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.
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."