"I mean, I try not to think about it because I love 'Mean Girls,' so I don't want to have a bad image of Lindsay Lohan," Brittany said on Monday's "Watch What Happens Live," while Jax, who was sitting beside her, mumbled, "What a terrible question."
"He says it's true," Brittany added. "His friends were there the night [it happened], and they've even said it, so I kind of believe -- I mean, I believe Jax -- 100 percent over Lindsay."
Of the alleged experience, Jax said he tries to "block it out," adding that he feels he's "hit rock bottom" if Lindsay Lohan's calling him a liar.
When Andy asked the reality star what year the supposed fling happened, Jax replied, "I think she got married like the next day? Or got in a car accident or something? I can't remember!" (One in the same, Jax. Those are one in the same.) He later gave Andy a rough estimate: "2006 or 2007?"
Jax first opened up about the alleged hookup back in 2015, but the topic resurfaced after he found himself at the same holiday party as Lindsay in 2017.
"It was at a nightclub, just ended up back at her spot and it was what it was," Jax told The Daily Dish at the time. "It was so long ago, and it was one of those things that it was just a drunken night, and it didn't mean anything. It wasn't worth my time."
In January of this year, when Lindsay stopped by the Bravo Clubhouse, she denied she ever hooked up with -- or even knew -- the "Vanderpump Rules" cast member. After hearing Lindsay's denial, Jax called her out on Twitter.
"Not that I care, it was over 10 years ago and I am happily engaged, but she's a liar," he tweeted along with a screenshot of a text message from his friend who was supposedly there that night. "My two friends who have nothing to gain were with me the whole night. That's all I will say on this. So you are lying, darlin'."
The screenshot Jax shared was of a conversation he had with his friend, Steve. Steve sent Jax a link to an article citing LiLo's denial and wrote, "Bullshit. Trav and I were with you when you went to her condo and she just got out of rehab. Lmao!"
"I know. I don't care," Jax replied at the time. "She was [in] the crazy house for how many years and didn't even know her own name? You think she remembers who she hooked up with?"
"Exactly," Steve wrote back. "She was asking Trav to get Lamar and he was like, 'Didn't you just get out of rehab???' Hahahaha."
Engagement Party Drama with Billie Lee
Billie Lee was devastated on Monday's episode when she found out Jax and Brittany had no plans of inviting her to their engagement party. The reason stemmed from Billie's friendship with James Kennedy, who's managed to offend nearly every castmate this season.
Brittany reiterated that she didn't want "drama" at her party, while Jax said it also had to do with simply wanting people there who've supported them and their relationship. Brittany said she and Billie had since "talked about it" and that she now fully understands the decision they made.
Transgender activist, influencer and model Gigi Gorgeous -- who was bartending Monday's "WWHL" -- was also asked to weigh in on Billie's reaction to not being outwardly invited to her castmates' Girls Night In event.
"I totally relate with this in a certain aspect -- feeling left out because you're transgender -- but I do feel that she blew it out of proportion a little bit," Gigi said. "I do take Lala [Kent]'s side here, but I wasn't there, so I don't know.
Why Is It Easy for Brittany to Forgive Jax?
A caller asked Brittany why she was able to forgive Jax and not James "when their actions are so similar."
"I love Jax, and I have a huge relationship with him," she replied. "I know James from being one of my very best friends' ex-boyfriends, so we never really had that bond. We never created a friendship, nothing like that. We worked every now and then together at SUR. I was very nice to him all the time, and he's disrespected me many times."
Jax and Brittany will say "I do" in June of this year, so a curious caller asked if they had already planned out their honeymoon.
"We haven't really decided yet," he said after assuring the caller they wanted kids "right away." Brittany said she wanted to go to "Jamaica or something tropical."
Stumbling over his words, Jax explained he and Brittany had just purchased a house and that he wasn't necessarily eager to drop thousands on a lavish trip.
"I've been pulling back maybe a little more than I should," he said, assuring a concerned Andy that he's saved all his "Vanderpump Rules" earnings.
Who From the Cast Spends the Most Money?
The conversation led to Andy asking his guests who from the cast spends the most money. Aside from Tom Sandoval, who effortlessly dropped $15,000 on a motorcycle just for the grand opening of TomTom, Jax and Brittany were in agreement: Lala followed by Stassi Schroeder.
Andy, Jax and Brittany also reminisced on the Season 7 reunion, which was shot last month -- and by the sounds of it, it'll be one for the books. Brittany said Katie Maloney and Tom Schwartz went over to their place after filming to play board games and "order a shit-ton of Taco Bell," so one thing we do know is that those four likely didn't squabble.
"We just recapped on what the hell just happened because it was such a whirlwind of emotions," Jax said. "Usually, we go out afterwards, but people were mad. Kristen just stormed off and didn't even talk to anybody. People kind of went their own way."
"Were people mad at me?" Andy asked. "I think Kristen might've been mad at me."
"It's never ended like that before! That's the first time the reunion's ever ended that crazy. It was scary. It was scary," Jax said before Brittany reassured Andy Kristen wasn't necessarily mad at him.
"That ride home was very somber," Jax added.
Last week, Scheana Shay stopped by TooFab ahead of what she described as a cringe-worthy finale and explosive reunion. She told us there was some "physical contact" she didn't expect -- and so much more. Check out everything she teased in the video below.
"Vanderpump Rules" airs Mondays at 9 p.m. on Bravo.