The battle between Jacqueline Laurita and Teresa Giudice is heating up -- with abuse and cheating rumors flying between them in a new clip fro the "Real Housewives of New Jersey" reunion.

In a sneak peek at the second of three (!) specials, Jacqueline and Teresa face off over their husbands' alleged indiscretions.

"Didn't he cheat on you a long time ago? That's what you told me," Teresa said of Laurita's husband Chris ... before Jacqueline denied ever saying that.

But with that, the flood gates were open ... and Laurita went off.

"Now that we're being honest, he calls her those names all the time and she calls him names and then they punch each other," Jacqueline said.

"And now that you're going there, you told me your husband cheated on you several times," she added. "You caught him with his secretary, the babysitter…and you asked me what you should do because my ex-husband had cheated on me."

Fans of the show remember Joe taking a mystery phone call from a woman during the last season, a moment that kicked off a lot of affair rumors.

Check out Teresa and Joe's reactions in the clip above. Part 2 of the reunion airs Sunday.