90 Day Fiance: The Other Way star Evelin Villegas is flipping out at Corey Rathgeber and Larissa Christina Dos Santos Lima and calling Corey a boring "loser" after he apparently went on a date with Larissa in Las Vegas last night.

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[90 Day Fiance: The Other Way Spoiler Warning: Please stop reading this story immediately if you do not wish to learn the apparent current status of Corey and Evelin's relationship.]

RELATED LINK: '90 DAY FIANCE' COUPLES NOW: WHO IS STILL TOGETHER? WHO HAS SPLIT? WHERE ARE THEY KNOW? (PHOTOS)

After ending his recent extended visit with 90 Day Fiance alums David Toborowsky and Annie Suwan in Arizona, Corey -- who has been shown desperately wanting to marry Evelin on 90 Day Fiance: The Other Way's currently-airing episodes and Evelin insisting she's not interested in taking their relationship to that level -- apparently headed to Las Vegas and met up with Larissa on Wednesday night.

Larissa -- who starred on Season 6 of 90 Day Fiance and Season 4 of 90 Day Fiance: Happily Ever After? with now former husband Colt Johnson -- documented the night on Instagram, posting videos and photos showing the pair gambling, laughing, and taking selfies together during their fun night out.

However, Evelin didn't approve of the behavior when she woke up and learned of it on Thursday morning -- and she didn't hesitate to put Corey and Larissa on blast and let the whole world know it!

"All [Corey] gives me lately is [disappointment]. Clearly in a [ridiculous] desperate need for fame and [recognition]. Theres only 1 more minute of your 'fame.' Stop being a loser," Evelin wrote a pair of Instagram Stories postings.

"Corey is way to[o] boring and needy for anybody, and [doesn't] have money is all an [illusion]."

Evelin also went on a lengthy rant in an Instagram Live video session in which she called Larissa a "whore."

"The problem is, she's making fun of it, like, she's not being -- she's a freaking whore, period. Because women don't do that to other women," Evelin said of Larissa.

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"What is Larissa doing? She's putting #coreyandlarissa. She's, like, going in and she's like, oh, [talking about how] they should be a couple and crap like that. Are you kidding me? She should be more respectful towards other women."

Evelin added, "That's just what she should be, but she's not. She's making fun of somebody else -- of a man that's supposed to be taken."

Evelin also argued she's not being a hypocrite because she only had "one ex-boyfriend before Corey."

As 90 Day Fiance: The Other Way viewers are well aware, Evelin previously hooked up with her ex-boyfriend when she and Corey were on a break, and it caused Corey to feel a lot of jealousy and resentment.

"That's it! It's not like I've been with everybody," Evelin said of her one past relationship.

"But yeah, haters are going to hate! What they're doing is wrong. I think it's wrong of Corey because -- let me tell you something: I think for Larissa, it's really hard to find men because she keeps sliding into other guys' DMs and she keeps just being like really, really slutty towards every man, which I don't have to do that."

Evelin continued in her live video, "And I'm not going to do that. If people want to eat other people's crumbs, well then she can do that."

Larissa's friend and roommate Carmen also joined the social-media fray after 90 Day Fiance Instagrammer John Yates reposted Evelin's Instagram Stories postings on his own Instagram account. 

RELATED LINK: '90 DAY FIANCE: BEFORE THE 90 DAYS' COUPLES NOW: WHO IS STILL TOGETHER? WHO HAS SPLIT? WHERE ARE THEY NOW? (PHOTOS)

In her comments, Carmen not only confirmed Corey and Larissa's night out was a date, but also insisted Corey had told Larissa he was "mega single."

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"Corey told her he is mega single and yes it was a date not a coincidence," Carmen commented.

"So, I believe Evelin should deal with him before [going] after Larissa calling her a slut, cause Larissa does not even kiss guys on the first date... As a single girl, she is free to hangout with whoever she wants."

Carmen added, "I saw his msg to Larissa, he told [Larissa] he was single but keeping low cause the show."

"I dont think if he believes they are together he would allow Larissa to post anything. When people are cheating they hide shit."

Although Evelin mentioned Corey is "supposed to be taken," the pair's recent social-media activity has suggested otherwise.

During her Instagram Live rant, Evelin even seemed to justify her reaction by saying she and Corey haven't "officially" broken up yet.

"If nobody had told [Larissa] yet or called her out, then somebody [needed] too. That's not how a lady behaves, you respect other people's men. Corey and I haven't officially broke up, so she needs to be respectful," she vented.

Last month, Evelin posted a couple of videos of herself dancing with a man at a club on her Instagram Stories.

And on September 18, Evelin also posted a video on her Instagram account wishing Corey a happy birthday. But in the process, she revealed Corey had blocked her and was spending his birthday away from Evelin.

"I'm not going to stop having fun just because some people don't like it. And also, I just want to say happy birthday, Corey! I can't believe you blocked me, but it's cool. We're good," Evelin said at the time.

"So yeah, everybody can tell Corey 'happy birthday' from me since I can't tell him. Anyways, everybody have a great, great day -- just like I will."

Based on a post Corey made on September 19, he appeared to spend his birthday in America, celebrating in his home state of Washington while Evelin was in Ecuador.

In the Instagram post, Corey seemed to confirm his relationship was on the rocks, but he essentially said it's no one's business but his own.

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Then, on September 20, Yates posted a screenshot showing Evelin and her 90 Day Fiance: The Other Way co-star Laura Jallali -- who has been visiting Evelin the last couple of weeks -- conducting an Instagram Live session together in Ecuador during which they reportedly confirmed they had each recently ended their relationships.

According to the posting, the women appeared to have been drinking before the Live session and reportedly said they were "together mending their broken hearts."

RELATED LINK: '90 DAY FIANCE: HAPPILY EVER AFTER?' COUPLES NOW: WHO IS STILL TOGETHER? WHO HAS SPLIT? WHERE ARE THEY NOW? (PHOTOS)

90 Day Fiance: The Other Way's season finale will air Monday, October 7 at 9PM ET/PT on TLC and be followed by the season's two-part Tell All reunion special the following two weeks.

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