Matt's Online Mistress Spills Sexting Secrets At 'Little Women: LA' Reunion

Briana Renee's best friends have always hated her boyfriend-turned-secret husband Matt Ericson, slamming his lying and apparent cheating.

And now, in a shocking twist, Ericson's alleged online mistress, Makayla, is telling all about their illicit affair during a surprise cameo on the Little Women: LA reunion finale.

In RadarOnline.com's exclusive video preview, Washington native Makayla claims Ericson initiated their sexy talk with messages about her "rack."

"It got more explicit into nude pictures, vulgar texts," she tells the women, including Ericson's wife Renee and his nemesis, Terra Jole, adding that she put an end to the relationship when "it got too out of hand."

"That's not how it happened!" Renee replies. "I have the conversation."

Her husband of nearly seven months has a much angrier response.

"We have the conversation, we'll make sure to put it on social media. Have fun with that, b*tch!" he snarls.

Makayla admits she told the Little Women: LA cast about the alleged cheating "because they needed to know"— and came clean to Renee herself.

"She was kind of naïve about it, saying, 'How do I know it's him?' Well, look at his tattoo, obviously if you're with him, you know the tattoo on his stomach," she recalls.

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When Makayla threatens to reveal the penis photos he sent her, Ericson encourages her to bring it on.

"Sure, I don't care! A lot of people get famous that way! I'm not shy, I don't care," he boasts.

The Other Woman ends with a message to Renee.

"I really do care for people, and I think that she really is a good person, and I just know that she's too good for him," she insists.

As RadarOnline.com exclusively reported, Manson eloped with Ericson last spring in Las Vegas— and kept the marriage a secret for four months, infuriating her friends Jole and Christy Gibel.