Shannon Beador Slams Husband’s “Stalker” Ex-Mistress for Showing Up at USC Game: “No Moral Compass”

It was one gritty game. Real Housewives of Orange County star Shannon Beador ripped her husband's former mistress, Nicole McMackin, as a "stalker" after their heated confrontation this past Saturday, Oct. 24, at a USC football game at the L.A. Memorial Coliseum.

"Go Trojans! Cheering with good friends!" Beador wrote this weekend on Instagram, alongside a snap of their section. "Sorry @tamrajudge couldn't make it! Someone with no moral compass decided to show up again. Watch reunion part 2 on Monday night and you will understand who I'm talking about. #narcissist #stalker."

As Us Weekly exclusively revealed this weekend, Beador and McMackin got into it at the college football game when David's ex-mistress showed up in their section. According to an observer, McMackin first attempted to grab the attention of the married couple by doing a casual walk-by. While the parents of three initially ignored her, McMackin and Shannon ran smack into each other while exiting the tunnel.

"That’s when Shannon calmly said to Nicole, 'You have a lot of nerve being here,'" the observer previously told Us, which was met with a "F—k you" by McMackin. The altercation continued, and infuriated Shannon so much that she returned to her section and yelled: "NICOLE is the woman who had an affair with my husband!"

As previously reported, Shannon's husband — a millionaire construction company founder — and McMackin carried on an eight-month-long affair in 2014. The illicit romance was later discovered by Shannon when she overheard him whispering on the phone and further investigated the situation.

Shannon Beador and David Beador
Shannon Beador and David Beador Michael Kovac/Getty Images for Hallmark Shoebox

While Shannon and David are good now, the affair nearly tore their marriage apart, as documented extensively on the recently concluded 10th season of RHOC. In an exclusive interview with Us Weekly this past summer, the two have even spoken out about their struggle to help other spouses in similar scenarios.

"We want to give other couples hope," Shannon told Us at the time. "Even if there is infidelity or something devastating in a relationship, if you both work and make the effort and love each other, you can get out."

Love my husband! Having an amazing night at the most incredible restaurant @panxacocina #restored #godisgood

A photo posted by Shannon Beador (@shannonbeador) on Oct 24, 2015 at 8:36pm PDT

She also shared a PDA snap with her husband a day after the run-in took place. "Love my husband!" Shannon captioned a pic of herself giving David a kiss. "Having an amazing night at the most incredible restaurant @panxacocina #restored #godisgood."

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