Ronnie Magro-Ortiz and his girlfriend Jen Harley, who gave birth to his first child on April 3, have reportedly ended their relationship.

"They are broken up," a source told E! News. "They're done."

Ronnie and Jen had an explosive fight Sunday on Instagram in which the Jersey Shore: Family Vacation star accused his girlfriend of cheating -- and she in-turn alleged he abuses cocaine.

"Note to self, can't turn a natural born HOE, into a HOUSEWIFE, if you find them in the gutter then leave them in the gutter," Ronnie, 32, wrote in a note on his Instagram Story on Sunday.

"Not all people can be saved when they are so far gone. All you can say you did ur best and keep it moving. #Facts #Yeahhh buddy."

Ronnie also posted the following "yes" or "no" poll for his fans: "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? #GiveMeYourThoughts."

Jen then took to her Instagram Story and responded to her boyfriend, "Can't turn a coke head into a father! Yeahhh buddy."

"Ronnie is melting down. People are trying to talk him off a ledge but he’s going crazy," an insider told Us Weekly.

Ronnie issued an apology for lashing out Monday on social media, writing, "I want to apologize for earlier to my fans, and especially @tater_to_kitty I acted on my gut and not rationally. I should've never acted in such a manor. My deepest apologies."

However, Ronnie still accused Jen of being unfaithful and posted a photo of her jumping into another man's arms.

"But I'm the cheater," Ronnie added in a hashtag, to which his girlfriend responded, "He wants to act fake on the show and like I'm some random he knocked up lol he was trying to get me pregnant. And then cheats on me while I'm preg on TV and then leaves me with a newborn baby lol baby daddy of the year award goes to @realronniemagro."

Jen was seven months pregnant when Ronnie filmed Jersey Shore: Family Vacation. And during last week's episode, Ronnie was shown grinding with a girl at a club and then taking her home.

After flirting in a hot tub, he escorted her into a bathroom. Not long after the door closed, however, roommate Paul "DJ Pauly D" DelVecchio interrupted Ronnie's good time, and the girl was sent home in a cab. Ronnie was shown venting afterwards to his pals about how he wasn't sure Jen was "the one" for him.
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According to Us, Jen actually kicked Ronnie out of their Las Vegas home two weeks ago -- and he's really upset.

"She saw how bad the cheating was while watching the show Thursday night," a source close to the couple told the magazine.

"Ronnie told her something was going down on the show, but not specifics or how bad it was -- and it was bad. She kicked him out of his house two weeks ago. They've been so rocky for so long -- even before he went to film the show."

The pair was first spotted together in July 2017, and everything seemed fine between the couple on Saturday, April 28, when they shared videos partying with each other on Instagram.

Ronnie and Jen named their baby girl Ariana Sky, and the reality TV star gushed about being a father earlier this month.

"Words can't describe the feeling. You live your life not ever really knowing the meaning of true love until you have a child. True unconditional love. You love your significant other, you love your family," Ronnie shared on social media.

"I have to say I understand when everyone said you'll understand 'when you have a child of your own or when you become a parent.' I know I have still tons to learn but I'm excited for this new journey & chapter in my life with my beautiful girlfriend & my daughter."