Jersey Shore has a reputation for being a bit more authentic than most reality shows -- but the show has definitely relied on a handful of semi-scripted storylines over the years.

That said, it's beginning to look more and more like the latest feud is fully legit, as the participants are not getting along on camera or off.

As you're probably aware, Angelina Pivarnick and Jenni Farley are not exactly besties these days.

The trouble started when Jenni's boyfriend, Zack Carpinello, groped Angelina during a group trip to Vegas.

The situation escalated when the guidos assembled in Seaside Heights a few weeks later.

This time, Snooki got involved, and she wound up storming out of the house while screaming at Angelina.

Farley briefly broke up with Carpinello when she saw the groping footage (she was passed out drunk at the time of the grope), but now the couple is back together, and it seems they're placing the blame for their split squarely on Angelina's shoulders.

So we have two timelines in play here -- the show one and the real-life one.

And it seems Angelina and Jenni hate each other on both.

The latest indication of bad blood off-camera comes to us courtesy of Angelina's Instagram.

Despite their many, many ups and downs, Pivarnick and fiance Chris Larangeira are still planning to get married soon.

Angelina hosted a bridal shower over the weekend, and as you can see from the photo above, Deena was the only Shore star in attendance.

"My lovely bridesmaids and maid of honor. Thank you for such a special day today. I wouldn’t of done it without you guys.," Angelina captioned the photo. 

"I loved everything everyone !!! Thank you I couldn’t thank everyone enough #bridalshower #love," she added.

Angelina tagged Deena and -- well, just about everyone else who attended.

And clearly, she enjoyed taking the opportunity to publicly snub JWoww and Snooki.

It's not so surprising that Jenni wasn't invited.

After all, she and Angeliners have really never gotten along.

But the Snooki snub is downright shocking, given the strides those two have made in their relationship over the years.

After all, Nicole basically served as Angelina's sponsor when she rejoined the Shore family last year.

The fact that she wasn't at the shower is just further evidence that this beef is the real deal.

And we're sure it'll continue to play out on camera in future episodes of Shore.

View Slideshow: Angelina Pivarnick to JWoww: Your Fugly Man is Dying to Bang Me!