Paula and Thomas are on the verge of calling off their wedding on Sunday’s episode of “90 Day Fiancé.”

The couple has been incompatible since Paula, 41, moved from Brazil to Long Beach, California, to be with Thomas, 31. Their lifestyles don’t mesh, given that even the scent of deodorant or perfume is enough to set Thomas off, and he’s accused her of not taking his sensitivities seriously.

The stress of Paula’s family visiting from Brazil to be at their wedding — and all eight of them uncomfortably staying at Thomas’ small apartment — has also taken its toll on them. On Sunday’s episode, they’re clearly getting on each other’s nerves during what’s supposed to be a romantic dinner just one day before their wedding.

The two argue right off the bat over Thomas insisting they ride his bike to the restaurant to save money on parking, instead of just driving there. The two argue even while riding the bike.

“Sometimes I don’t think you are mature enough,” she later tells him at the restaurant, pointing out that she was uncomfortable riding the bike because she’s wearing a dress and that her hair and makeup is now ruined.

“This is too much,” she continues. “I like adventure, but there’s a certain time for stuff. Sometimes I want to be adult.”

Thomas smirks in response and says he thought it was a good idea to ride his bike, and corrects her when she asks if it was really worth saving $12 in parking to say that they actually saved $20.

Paula then gets emotional and says she feels like she’s losing herself, but Thomas accuses her of not wanting to compromise either.

“I’m not happy with some of the stuff that you’re doing and some of the requests that you’re making,” he points out. “You’re very compulsive and you’re very focused on, like, consumerism.”

Paula admits that with her family visiting her, she wants to go back to Brazil with them because it would be “easy” for her. Thomas is understandably upset, and says he wanted to hear that she was excited to marry him, not her threatening to go back to Brazil.

Still, he doesn’t appear to take her seriously and says she just needs a new “challenge” in life.

He tells her, “I think your natural instincts are always to do the easiest knee-jerk reaction.”

A fed-up Paula has had enough, and shockingly curses at him in Portuguese.

“You are so annoying,” she tells him. “You’re a son of a bitch. You’re so f–king annoying.”

After he awkwardly stays silent as she berates him, he wonders if they’re breaking up.

Thomas questions about their wedding the next day, “I don’t know, are we still doing this?”

She dramatically replies, “No. I can’t, I can’t. This is too much.”

Paula explains to cameras, “I love Tom, but the problem is being stuck unhappy, being stuck in a situation that I don’t want to be.”

“90 Day Fiancé” airs Sundays at 8 p.m. ET/PT on TLC.