It almost stayed in Vegas.

Scheana Shay and Tom Schwartz each shared their side of the story after Schwartz revealed that they kissed in Las Vegas in 2013 while he was dating Katie Maloney.

“Everyone’s cheated. We’ve all cheated, like, everyone’s done stupid s––t. I cheated, I was a makeout slut, [I] made out with Scheana like 12 years ago in Vegas,” Schwartz told Lala Kent while trying to defend Tom Sandoval on Tuesday’s episode of “Vanderpump Rules.”

Kent, 33, immediately gasped as Schwartz, 41, further said that “no one even knows that.”

“It was so long ago. It was like the most innocuous thing ever, but I’m just saying, we’ve all, like, we’ve all done [stuff],” Schwartz explained.

When Kent asked for details, he claimed that he did “not know” exactly when it happened, but it was “somewhere in Vegas.”

“Me and Katie were dating, but it was like a rocky moment,” he admitted.

Schwartz later took to his confessional to say he shared the news because he wanted it to serve as a “reminder [that] we’re all human, [and] we all do dumb s–t sometimes.”

“It just popped into my head the other day. Sometime late last year, [Scheana and I] were at a party around the holidays, and she’s like, ‘Do you remember when we made out?’ And I was like, ‘We did make out, right? We kinda made out?”

Kent argued that a makeout would mean that Shay “dabbled” in the realm of cheating, since she was engaged to now ex-husband, Mike Shay, and Schwartz was dating Maloney.

“Scheana and I have gotten extremely close. We’ve become each other’s vaults, and it just seems strange to me that at no point in time was she like, ‘Girl, I gotta tell you something. I gotta spill some tea.’ Like, what?” Kent wondered in her own confessional.

Kent then asked Schwartz if he ever told his now ex-wife, to which he said he did “not know if I told Katie.”

Later in the episode, Kent took it upon herself to spill the news to Maloney, 37, and after she told her, Maloney looked shocked.

“What the actual f–k? Like are you kidding me? I just have so many questions –– like when was this? And where exactly was this? And was this the time that Schwartz said he went to Vegas and made out with one of Scheana’s friends, and was it actually in fact Scheana?” Maloney said in a confessional, referring to Schwartz admitting to making out with someone in Las Vegas in 2013.

Shortly afterwards, the entire cast had a night out at Hotel Ziggy in West Hollywood, and Maloney pulled Shay, 38, aside to ask her about the alleged makeout.

“What happened was, me and Ariana [Madix] were there with my mom and my sister for her cheer competition in like f–king high school, and Schwartz pulls me in the corner and kisses me,” a stunned Shay claimed.

Shay recalled that it happened right around the time she got engaged to Mike Shay, which would’ve been in the summer of 2013.

“Saying somebody tried to kiss somebody versus making out is like a different thing,” Maloney pointed out.

However, Shay doubled down that it was not a makeout like Schwartz described.

“We did not, that was not, nope, nope, no, no, that was not a makeout, no, no, no,” Shay argued.

Shay then claimed that the person who she “was making out with on that trip” was Madix.

“I wanted to pretend like this never happened. I never told [Mike] Shay, I never told my mom, I never told my best friends. I mean also, I would never have told Katie, especially back then, because like the bitch is scary,” Shay said in a confessional.

“I mean, this was peak tequila Katie hates Scheana days, there’s no way in hell I was gonna be like, ‘By the way, your man wanted me in Vegas, and he kissed me,’ like, no! Never!” she continued, referring to Maloney’s old nickname that she inherited after she would drunkenly argue with people.

Maloney then asked Shay why the two of them were recently “joking about it” like Schwartz claimed.

“I may have made a comment like, ‘Oh well, yeah, you’re a makeout whore, like, you tried with me once,” Shay explained.

Maloney emphasized that what made her upset about the revelation was that Shay withheld this information while she was a bridesmaid and involved in Maloney and Schwartz’s wedding.

“It’s like, this never came up at all? I would assume Tom, oh yeah he’s been in talks with like a million girls, but I was like a broken person. I was a shell my self-confidence and my self-worth was like next to nothing,” Maloney shared.

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Shay explained that she “never” would’ve told Maloney, because she didn’t want to “hurt [her] more.”

“I wanted you guys to work out, I wanted this to be Schwartz did this in his past, and he f–ked up, but you guys got married, and you had your happily ever after. I wanted to be apart of that day,” she said.

Maloney –– who filed for divorce from Schwartz in March 2022 –– ended the conversation by telling Shay that she wishes she “would’ve known.”

“I would’ve expected something like this from Schwartz, but Scheana’s had literal years to tell me about this,” Maloney said in a confessional. “I don’t like liars and especially lying by omission. It just makes me wonder if I’ll ever be able to really fully trust or be close to Scheana.”

“Vanderpump Rules” airs Tuesdays at 8 p.m. ET on Bravo and streams the next day on Peacock.