Siggy said she was introduced to newcomer Margaret Josephs through a mutual friend before Margaret's start on the Bravo series, but things went south very quickly.
"Right off the bat, right out of the gate, I introduce somebody to the group and welcome this person with open arms," Siggy told TooFab. "My energy and my chemistry with this person does not work. That has been shown in the trailer."
The explosive Season 8 trailer shows Siggy yelling at Margaret from across the table. "You're one of the ugliest human beings in the world for making fun of me," she says in the tease of the heated argument.
In another scene, Siggy explains to veteran housewife Teresa Giudice during dinner that she wanted to "take [Margaret] and pull on those pigtails until they come out of her head."
Although Siggy had met Margaret once before, she said she didn't know her well enough for Margaret to "carry all this animosity and hatred and snarkiness" toward her.
"I'm disrespected over and over and over and over again throughout the season, and you're gonna see how I handle every time that I'm disrespected," she said.
Siggy said Margaret was "a fabulous addition" who stood "on her own two feet" before she was "blindsided."
"I never heard anything but nice things about her," Siggy said. "We've passed each other in town, liked each other's Facebook pictures, always supported each other in our ventures we do in this world and where we stand on this planet. I had no idea. I was actually very blindsided. I was extremely hurt and shocked over what transpired over this season."
"The Real Housewives of New Jersey" Season 8 premieres Wednesday, Oct. 4 on Bravo.