'Jersey Shore' Star Ronnie Ortiz-Magro Apologizes After Putting Baby Mama on Blast in Explosive Instagram Fight

UPDATE at 12pm on 4/30: Harley went live on Instagram Monday morning in a video where she and Ronnie were seen in a heated argument. In a clip posted on TMZ, Ronnie keeps trying to show video on his own cell phone, repeating, "Why don't you want to show that?" before things appear to get physical. Original story below.

"Jersey Shore" star Ronnie Ortiz-Magro has apologized after getting into a nasty fight with girlfriend and baby mama Jen Harley, airing their dirty laundry out on social media.

The reality star unloaded on Harley in a series of now-deleted Instagram Story posts on Sunday, but worry not if you missed them -- because we kept the receipts!

Ronnie's social media battle began when he posted to Instagram, "Note to self: Can't turn a natural born HOE, into a HOUSE WIFE. If you find them in the gutter [then] leave them in the gutter," he continued, "not all people can be saved when they are so far gone. All you can say you did ur best and keep it moving!" He captioned the photo with the hashtags "Facts" and "YEAHHHHHHBUDDYYYY."

He followed that up with another IG Story shortly after, one which gave a little more insight into the feud. "If your significant other keeps sex videos of their ex, shouldn't they show enough respect to delete them, esp. after being in a new relationship for over a year," he asked, along with a Yes/No poll for fans to vote.

But Ronnie wasn't done yet.

He then shared two text message conversations, one which appears to be with his "Jersey Shore" costars in a group called "Just Us WE FAMOUS FAM." Of his girlfriend's alleged racy videos, someone named Deena -- likely Deena Cortese -- asked, "What girl even keeps that lol." Ron's response: "Exactly." Another text message to someone named Mikey -- possibly Mike "The Situation" Sorrentino -- had the caption, "So everyone knows I'm NOT a cheating scumbag! My actions are caused my disgrace and fidelity." In addition to those posts, he also shared messages from fans who had his back.

Harley responded to the craziness on her own Stories with some also-since deleted posts. First, she wrote, "Can't turn a coke head into a father! Yeahhh buddy." She then posted what appears to be a private text exchange between her and Ronnie. In it, "Ron" writes, "And now I'm blocked," "Pls take it down," "U wanna block me and tarnish my name bc u got caught," and "This is going to Mason and ur grandmother," as well as some sort of video. Mason is Harley's 11-year-old son. "What kind of man says this shit," she added.

In a later post, she wrote, "When your man goes all Rob Kardashian on you," with a laughing Emoji.

Late Sunday night, Ron removed all his posts and apologized for his actions. "I want to apologize for earlier to my fans, and especially [Harley]. I acted on my gut and not rationally," he wrote. "I should've never acted in such a manor [sic]. My deepest apologies [sic]"

Harley hasn't responded to the apology, but she did remove all her earlier posts.

The blowup comes days after Ronnie admitted he still has feelings for ex-girlfriend Sammi "Sweetheart" Giancola on the most recent episode of "Jersey Shore: Family Vacation." In the same episode, Ron also brought another woman back to their home, which Pauly D interrupted before anything serious happened.

Ronnie and Jen welcomed their first child together, a daughter named Ariana Sky, earlier this month.