AceShowbiz - "Jersey Shore" alum Ronnie Ortiz-Magro got into a fight with his ex-girlfriend and baby mama Jen Harley on Sunday, June 24. The fight, which involved physical aggression, resulted in Jen being arrested. Jen, 31, was busted in Las Vegas on a charge of first-degree domestic battery and her bail is set at $3,000.

The former couple, who shares 2-month-old daughter Ariana, reportedly began to fight while driving home from a barbeque. A source tells Us Weekly that Jen threw punches at the star during an argument. "Jen hit Ronnie in the face during the argument, and he asked [her to] pull over and let him out of the car," the source says.

The violence didn't stop there though. "She stopped, and Ronnie tried getting out and got caught in his seatbelt. Jen started driving away, dragging Ronnie. Ariana was in the car at the time in the back seat. Ronnie's face was bloodied and bruised, and he's got a nasty road rash," the source explains.

Jen was arrested on Sunday night. There's no information about who reported the incident to the police. However, she had been considered as suspect and wanted for domestic violence since she and her estranged lover had a physical fight over a dead dog in Las Vegas when Ronnie was filming "Jersey Shore Family Vacation" season 2 on June 7. "Jen lunged, spit and shoved Ronnie. Hotel security got involved, who then called the Las Vegas police department," the source reported.

Before Jen was arrested on Sunday, she called a friend to pick up Ariana. Ronnie, meanwhile, was going to meet a family counsel to discuss the problem. "Ronnie is going to his family counsel first thing this morning to see what his options are because whatever they are doing is not working," the source adds.