Jersey Shore: Jenni ‘JWoww’ Farley dumps Zack Carpinello after finally seeing flirty Las Vegas video

Jenni ‘JWoww’ Farley dumped her boyfriend and attacked her castmate on social media after finally seeing video of their drunken escapades on Thursday’s Jersey Shore: Family Vacation.

In an incident that happened five months earlier, Jenni’s beau Zack Carpinello, 24, and her friend Angelina Pivarnick, 33, flirted heavily while Jenni, 34, was passed out at a Las Vegas club.

But the mother of two hadn’t seen the footage until the show aired late last year, and when she did, she was devastated, having had no idea that it was as bad as it seemed onscreen.

Relationship over: Jenni ‘JWoww’ Farley dumped her boyfriend and attacked her castmate on social media after finally seeing video of their drunken escapades on Thursday’s Jersey Shore

Her castmate Vinny Guadagnino, 32, predicted at the time that Jenni would ‘kill’ both Zack and Angelina if she knew what was going on, and her reaction, when it came, was swift and fiery.

She broke up with Zack and went after Angelina online, Tweeting, ‘Grinding on someone’s man? Asking for a 3 some? Kissing someone else’s BF? That’s a blatant disregard of boundaries.’

Vinny, who was preparing for his second Chippendales run in Vegas when the news broke, empathized with her plight, saying, ‘I feel so bad for Jenni. She’s been through so much.’

Jenni had just finalized her divorce from ex-husband Roger Matthews, and the two of them were working out contentious custody issues when she found happiness with Zack, aka ’24.’

The video: The 34-yer-old reality star finally saw the video of her beau Zack Carpinello, 24, and her friend Angelina Pivarnick, 33, flirting heavily while she was passed out in Las Vegas

The video: The 34-yer-old reality star finally saw the video of her beau Zack Carpinello, 24, and her friend Angelina Pivarnick, 33, flirting heavily while she was passed out in Las Vegas

Twitter post: JWoww took to Twitter to blast Angelina for her role

Twitter post: JWoww took to Twitter to blast Angelina for her role

After watching the episode, Jenni told her pals Nicole ‘Snooki’ Polizzi, 32, and Deena Cortese, 33, that it had broken her heart.

‘I was literally sitting in my living room, blindsided,’ she recalled. ‘There wasn’t even an inkling of knowing that’s how it happened.’

‘As I’m watching this episode unfold, I’m looking at how inebriated and intoxicated I am, then I’m looking at my boyfriend, who’s not helping me whatsoever and actually making the whole situation worse by touching Angelina inappropriately,’ she added.

Broken heart: After watching the episode, Jenni told her pals Nicole 'Snooki' Polizzi, 32, and Deena Cortese, 33, that it had broken her heart

Broken heart: After watching the episode, Jenni told her pals Nicole ‘Snooki’ Polizzi, 32, and Deena Cortese, 33, that it had broken her heart

‘I deserved better than that night and it’s something that ever since that night, I can’t get over.’

‘Mortified’ by what she’d seen, Jenni told Zack their relationship was through, saying, ‘This is it, this is done, were not continuing this.’

She then posted the message on Twitter designed to hurt Angelina, which she admitted had a ‘snowball’ effect.

For her part, Angelina told fiancé Chris Larangeira that it was ridiculous Jenni wasn’t speaking to her when Zack had been the one in the wrong.

Misplaced anger: For her part, Angelina told fiancé Chris Larangeira that it was ridiculous Jenni wasn't speaking to her when Zack had been the one in the wrong

Misplaced anger: For her part, Angelina told fiancé Chris Larangeira that it was ridiculous Jenni wasn’t speaking to her when Zack had been the one in the wrong

‘She finally sees it now and now she’s mad at me, when I told her so many months ago?’ Angelina wondered aloud. ‘She never gave a f*** about my feelings; I don’t give a f*** about hers. ‘Cause guess what? This is our wedding time and I’m not dealing with this.’

‘Let me tell you something. I will literally make sure I make her life a living hell.’

Despite her anger, Jenni made clear that she still loved Angelina and wanted her to do well.

Living hell: Chris listened as Angelina said she did not care about Jenni's feelings

Living hell: Chris listened as Angelina said she did not care about Jenni’s feelings

She was well aware that her pal had a bridal shower, bachelorette party, and wedding in the weeks ahead, and didn’t want to take away from that with her own ‘unresolved issues.’

Deena was the only one to show up to Angelina’s bridal shower, where she learned that the bride-to-be had also gotten into a friendship-ending ‘blowout’ with maid of honor, Janine.

‘Everywhere this girl goes, there’s drama,’ Deena marveled in a confessional. ‘It follows her.’

Bachelorette party: A bachelorette party was planned for Angelina in New Orleans

Bachelorette party: A bachelorette party was planned for Angelina in New Orleans

‘I’m just hoping and praying that when the wedding does come, everyone shows up and everyone leaves the drama at home, including Angelina… because she could be the one to ruin her own special day.’

After the bridal shower, Angelina met up with her old Jersey Shore roommate Vinny, and confessed that she’d just found out via Instagram that Chris went to a strip club behind her back.

When she confronted him, she said, Chris told her ‘You’re full of s***. You’re a psycho.’ She then took her ring off and told him, ‘I’m done.’

Post shower: After the bridal shower, Angelina met up with her Jersey roommate Vinny, and confessed that she'd just found out via Instagram that Chris went to a strip club behind her back

Old friend: Vinny listened as Angelina complained about her fiance going to a strip clubb

Post shower: After the bridal shower, Angelina met up with her Jersey roommate Vinny, and confessed that she’d just found out via Instagram that Chris went to a strip club behind her back

‘Angelina, let me remind you that you came to a Chippendales show and you showed a stripper your vagina,’ Vinny teased her, recalling an incident in which Angelina sat on a man onstage.

‘Chris could have left you just for that. So that’s not something to get your panties—that you don’t wear—up in a bunch.’

Vinny sensed that the drama with 24 was also ‘a misunderstanding’ on all sides.

Many misunderstanding: Vinny was convinced that Angelina was having 'misunderstandings' with her fiance Chris and JWoww

Many misunderstanding: Vinny was convinced that Angelina was having ‘misunderstandings’ with her fiance Chris and JWoww

Deena similarly urged Jenni to give Angelina a chance, pointing out that she fought with many of her friends and ‘doesn’t know how to resolve issues.’

She successfully convinced Jenni to go to Angelina’s bachelorette party in New Orleans.

‘I feel the need to apologize,’ Jenni affirmed to the cameras. ‘It’s not easy for me, but I’m going to give it my best efforts.’

Showing support: Jenni was talked into going to New Orleans to support Angelina

Showing support: Jenni was talked into going to New Orleans to support Angelina

‘I’m curious to see if we can ever get back to a good place. It’s like a series of unfortunate events. Let’s close that s*** and start anew.’

In New Orleans, she and Deena decorated the group’s hotel suite at Harrah’s with balloons, beads, blow-up dolls, hats and other bachelorette paraphernalia for Angelina.

When they were done, Jenni told Deena that she didn’t know if she could get over what happened with 24, saying, ‘The worst part of it is he didn’t show that side for five months.’

Not ready: Jenni told Deena that she didn't know if she could get over what happened with 24, saying, 'The worst part of it is he didn't show that side for five months'

Not ready: Jenni told Deena that she didn’t know if she could get over what happened with 24, saying, ‘The worst part of it is he didn’t show that side for five months’

‘I look back like, ”Who the f*** is that?”,’ she admitted, saying it had destroyed her trust.

As the two talked, Angelina and Snooki rode a party bus to their hotel, ready to go out.

Angelina had already replaced Jenni as a bridesmaid, and said she wanted to avoid any ‘drama.’

Trust destroyed: 'I look back like, ''Who the f*** is that?'',' JWoww admitted, saying it had destroyed her trust

Trust destroyed: ‘I look back like, ”Who the f*** is that?”,’ JWoww admitted, saying it had destroyed her trust

Jenni waited for her nervously in the hotel room as Angelina’s bus drew nearer, saying, ‘I have a thousand scenarios going through my head, but I really don’t see one being positive.’

The men in the cast were having more fun, especially Mike ‘The Situation’ Sorrentino, 37, who had just been released from federal prison after serving eight months for fraud.

As the episode began, ‘Uncle Sitch’ met Snooki and Deena’s babies Angelo and CJ, aka ‘the baby meatballs,’ who’d been born when he was in prison.

Good times: The men in the cast were having more fun, especially Mike 'The Situation' Sorrentino, 37, who had just been released from federal prison after serving eight months for fraud

Good times: The men in the cast were having more fun, especially Mike ‘The Situation’ Sorrentino, 37, who had just been released from federal prison after serving eight months for fraud

Mike swooned over the babies and their ‘Free Sitch’ t-shirts, saying he was ‘ready to be a dad.’

DJ Pauly D, 39, made CJ do a little ‘fist bump’ and asked the kids if they’d been to the Shore yet.

The guys later decided to have their own party in Vegas while the women went to New Orleans, dubbing it ‘Thot-chella 2.0.’

Absent from their shindig was Ronnie Ortiz-Magro, 34, who’d been arrested once again last October after another blowout with Jen Harley, 32.

Jersey Shore: Family Vacation returns next week on MTV.

Baby meatballs: As the episode began, 'Uncle Sitch' met Snooki and Deena's babies Angelo and CJ, aka 'the baby meatballs,' who'd been born when he was in prison

Baby meatballs: As the episode began, ‘Uncle Sitch’ met Snooki and Deena’s babies Angelo and CJ, aka ‘the baby meatballs,’ who’d been born when he was in prison