Allyshia Gupta has claimed Katherine "Kat" Izzo had a boyfriend back home and was sending him love letters while dating Dale Moss on Bachelor in Paradise.

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"Spoiler," Allyshia teased to Nick Viall during the August 19 episode of his "The Viall Files" podcast.

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Allyshia went on to drop a bombshell, recalling a juicy conversation she and Sean had with someone after they self-eliminated from Paradise.

"So Sean and I leave and we have a conversation with his friend, Sean's best friend who was [Kat]'s boyfriend at the time. [Sean] told him, 'You won't believe who ended up screwing me over,' and all this. And he fills us in!" Allyshia claimed.

"[The friend] said [Kat] has been sending him love letters since Day 1 of Paradise."

(As Bachelor in Paradise viewers can probably recall, Kat and Dale had begun dating on Day 2 of Paradise.)

Allyshia explained that Bachelor in Paradise producers took all of the cast members' electronics away at the start of filming, which is the normal protocol for The Bachelor franchise, but Kat "somehow snuck in her iPad" and was able to use it.

"She was sending him things to get him through, like, 'This will last you until I get back from Paradise!'" Allyshia claimed, suggesting Kat may have been sending her alleged then-boyfriend steamy pictures or sweet messages.

Allyshia called the situation "crazy" and exclaimed, "And Sean sat on that and defended her knowing that because she was his friend!"

And that's apparently one of the main reasons Sean felt so "betrayed" when Kat had turned her back on him just because he was strategizing and politicking to stay in Paradise longer.

"That's when I was like, 'Listen, we're burning sh-t to the ground now!'" Allyshia recalled.

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Nick pointed out how Bachelor in Paradise alum Zoe McGrady had some things to say about Kat as well.

Although Nick did not name Zoe as his source, the former The Bachelor star said he heard that Kat had "written some messages on her arm" for her man back home, hoping the cameras would catch them.

"Oh, I don't know. Some of that stuff, I really don't know. But I will say on the Kat note, after watching this episode, I think she's going to have enough heat to deal with. I don't want to... pile on," Allyshia said.

"A girl ratting on another girl, I really don't want to be that person."

Allyshia pointed out how she believes Kat is also upset about a comment she had made earlier this month on the "Bachelor Happy Hour" podcast.

Allyshia had said that she would've ended up with Dale, not Kat, had she arrived in Paradise sooner.

"I think she's also upset about that comment I made about coupling up with Dale, which I'm not sure why," Allyshia said.

"I told everyone since the second I got in there, her included, she was the second person I had that conversation with, that I was interested in getting to know Sean and Dale. That's okay -- you're on a show where you're meant to date other people."

On Bachelor in Paradise's August 18 episode, the cast was able to vote out two men and their partners from Paradise, and that's when Sean decided he must play the game for $500,000.

Sean attempted to rally troops -- namely Dale, Jeremy Simon and Andrew Spencer -- to target the strongest couple in Paradise, who appeared to be Spencer Conley and Jess Edwards.

But the more Sean plotted and planned, the more his plan backfired and his friends began viewing him as sneaky and untrustworthy. Sean also got into a fight with Kat because she wouldn't support him.

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Feeling betrayed, Allyshia and Sean decided to self-eliminate from Paradise with their integrity still intact.

Bachelor in Paradise host Jesse Palmer later confirmed that the cast had voted Sean and Allyshia out anyway.

When looking back on all the drama, Allyshia said she still can't believe that Kat denied being Sean's friend when he clearly needed her the most.

"I was like, 'You're going to sit here and say you aren't friends with Sean after everything?!' I had to bite my tongue," Allyshia told Nick.

"It's so annoying when the guy you like is sticking up for the girl you don't [like]. But I was like, 'I do trust Sean. I think he has a good judge of character.' So I was really trying to give her the benefit of the doubt. And then when that [Sean and Kat fallout] happened, I just felt so vindicated."

Allyshia admitted it was an "I told you so" type of moment with Sean.

"I was like, 'I told you, Sean. I told you since Day 1 that I was right about it!' That's crazy," Allyshia said.

"And then she went back telling all the guys that he cursed her out and that no guy should still be there who talks to women so disrespectfully, and blah, blah, blah. And all the guys believed it because of, I think, the reputation Sean had built himself up to that point."

Allyshia acknowledged how she unfortunately got stuck in the crosshairs of the conflict.

"I think [I was] a casualty of that war between Kat and Sean. But, to me, that goes back to, like, you don't have your friend's back in that moment because Sean started getting a bad rap," Allyshia vented.

"All of a sudden it's, 'I don't know him; I'm not his friend.' I'm not that type of a person and I really don't like people like that. And this was after they had spent the holidays together!"

In addition to Sean and Allyshia's departure from Paradise on the latest episode, Brian Autz and Parisa Shifteh were also voted out and eliminated.

RELATED LINK: 'THE BACHELOR' FRANCHISE COUPLES NOW: WHO IS STILL TOGETHER?? (PHOTOS)

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About The Author: Elizabeth Kwiatkowski

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