Meghan King Edmonds Goes After Lydia McLaughlin & Her Christian Faith in Tense 'RHOC' Reunion

"I just think you should use your brain and not have the Bible tell you what's right and wrong all the time," Meghan King Edmonds tells Lydia McLaughlin on the RHOC season 12 reunion

Meghan King Edmonds and Lydia McLaughlin may need to put forgiveness into practice after going head-to-head on the Real Housewives of Orange County season 12 reunion.

In a teaser for Monday’s upcoming episode, Edmonds attacks McLaughlin’s Christian faith and tells her to use her brain instead of turning to the Bible for wisdom after host Andy Cohen brings up the topic of psychics.

During a party at Edmonds house earlier in the season, the mother of one invited a psychic to her home, and Lydia McLaughlin opted not to participate in the readings.

“I don’t believe in psychics,” McLaughlin, 36, tells Cohen.”I don’t want to be around that.”

When Edmonds asks her why she doesn’t “believe that they’re people,” McLaughlin explains, “I do and I was talking to him when it wasn’t about psychic stuff.”

“Because at my party on the show, you said,” Edmonds, 33, says before McLaughlin fires back, “Oh, you’re coming out Meghan, all right! Game friggin’ on!”

According to Edmonds, McLaughlin said that she didn’t want to be at the party because a psychic was there: “That hurt my feelings because this is my friend,” says Edmonds.

But McLaughlin isn’t the only one who doesn’t believe in consulting a psychic. “I don’t,” admits fellow Housewife Peggy Sulahian, “because in Armenian it means ‘written on my forehead.’ ”

McLaughlin proceeds to ask Edmonds, “Why would I call you to tell you I’d feel uncomfortable around your psychic?”

“I’m just trying to say,” Edmonds says before McLaughlin presses her: “What? What are you trying to say?”

“What I’m trying to say is it doesn’t make sense to me because they’re not trying to push anything on you. They’re just trying to be a normal person. So why can’t you just be around that?” Edmonds tells her.

WATCH: ‘RHOC’s’ Lydia McLaughlin’s Mom Judy to Shannon Beador: ‘We’re All Lost Souls’

To McLaughlin, Edmonds won’t understand her perspective because they don’t share the same beliefs and faith.

“You don’t believe in Jesus. You don’t understand my faith, so of course it’s not going to make sense to you. It doesn’t need to,” McLaughlin says to Edmonds.

Edmonds replies, “I don’t know. I just think you should use your brain and not have the Bible tell you what’s right and wrong all the time.”

Immediately after Edmonds spouts her controversial comment, Vicki Gunvalson quickly turns her head to observe McLaughlin’s response and Kelly Dodd lets out an “ooh.”

“Well, I use my brain to read the Bible,” says McLaughlin.

“Maybe you just do the right thing,” offers Edmonds, who adds, “It struck a nerve with me because I just think people should be treated equally.”

“Well, I think you’re going to strike a nerve with a lot people,” McLaughlin tells her.

The first episode of a two-part season 12 Real Housewives of Orange County reunion airs Monday, Nov. 20 (9 p.m. ET) on Bravo