June 09, 2016 12:00 PM

Everything is bigger in Texas … especially the drama.

PEOPLE can exclusively reveal a sneak peek from the upcoming Real Housewives of Dallas supersized reunion, airing June 19, and it’s safe to say the tension between Cary Deuber and LeeAnne Locken – which has been building all season – comes to a head when Cary confronts Locken for spreading rumors she stole her husband Mark Deuber from his previous wife.

“So, you two did not have an affair?” host Andy Cohen asks Cary and Mark.

Cary, crying, shakes her head and says, “No.”

Cohen then asks Brandi Redmond if she’d overheard Locken “out parroting this information,” which Redmond confirms, but maintains she “didn’t want any part of it.”

When asked why she never confronted Cary about the alleged husband-stealing, Locken chalks it up to the fact that she and Cary “don’t get along.”

“We’ve never gotten along,” she adds. “We haven’t gotten along since before Cary actually even knew me.”

“That is not true!” Cary counters. “I called you, we had conversations.”

“We had one conversation,” Locken says.

“Before this show, I never had a problem with you, but you said that I did,” Cary says.

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As Locken starts to launch into an explanation, Cary interrupts: “You’re misinformed again.”

“As are you!” snaps Locken. “About several things about me.”

“What am I misinformed about you?” Cary asks.

“You don’t have to be born into society to be a socialite,” Locken says. “You tell me that I’m a social climber and I’m not. I show up at charity events because I truly give a s— about charity!”

When Cary tries to respond, Locken interrupts.

“Why disrespect my charity and say that it’s not okay for me to quote, unquote ‘spread rumors about your marriage’ but it’s okay for you to quote, unquote ‘spread rumors about why I do charity?’ ” she demands.

“That’s not spreading rumors, I’m saying it to your face!” Cary says, looking shocked and turning to her husband in disbelief.

At that point Mark gets involved, demanding Locken explain herself.

“Where did she spread the rumor?” he asks. “She didn’t go around saying that s— to anybody about you. You went around – on camera you’re going around saying she stole me! You said it four, five times!”

“Why do you say it?” Mark continues, growing increasingly frustrated.

“Oh my God, are you alright, honey?” Locken responds, voice dripping with sarcasm.

Meanwhile, that’s not the first time Locken has been ultra-candid about her beef with her costar – she told PEOPLE earlier this week that Cary wants to “destroy my reputation.”

“This is a woman who has issues with me. This is a woman who constantly wants to say that I’m jealous of her,” Locken said. “I don’t know if you’ve seen what our husbands look like, but yeah, no. Not so much. Mine’s got a head full of hair, a body chiseled like a saint and, by the way, he truly and authentically loves me, which is why I don’t have to talk about having sex all the time with him, because when you do it, you don’t have to talk about it.”

“I think Cary is so desperate for someone to be jealous of her life, but it’s not going to happen with me,” she added.

The Real Housewives of Dallas finale airs Monday (10 p.m. ET) on Bravo, followed by the supersized reunion on June 19 at 9 p.m. ET.

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