Ariana Madix and her boyfriend, Tom Sandoval, endured a tense moment during a recent episode of Vanderpump Rules.

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After learning of Sandoval's plans to travel to Las Vegas for a guy's trip in honor of Peter Madrigal's birthday, Madix announces that she's "f**king pissed" that she'll be sitting at home by herself doing absolutely nothing.

"That's not fun for me," Madix fires back at Madrigal.

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"I really, really hate heteronormative f**king bulls**t," Madix explains to cameras during a confessional. "You're not going to tell me, 'This is a guy's thing, and this is a girl's thing.'"

Madix then takes things one step further, announcing that anyone who agrees to celebrate Madrigal's birthday in Las Vegas will be disinvited from her upcoming bash.

"Anyone who thinks they are going to Vegas the day after my birthday is not invited to my birthday," she says. "I will cancel my whole birthday party or you will not be invited. No one who is going to Vegas the next day is invited to my birthday party."

When Sandoval attempts to calm her down, Madix then tells him that he will also be disinvited.

"You're not invited if you are going," she fires at him.

Madix then explains that it will make her feel "sh***y" if Sandoval spends then night with her after her party, and then leaves the next day for his guy's trip.

For more of Ariana Madix and Tom Sandoval, tune into Vanderpump Rules season four airing on Mondays at 9 p.m. on Bravo.