wrote: "PSA who needs to hear this… As you can see even to this day the abuse never ends, this is your chance, get out now. RUN!
"So not let someone make you feel like it is your fault for their actions!!
"I promise you it will only get worse."
Jenn and Ronnie share a 3-year-old daughter, Ariana Sky.
Jenn’s boyfriend Joe also jumped onto social media to confirm she was not involved in the recent altercation, and to slam Ronnie.
He wrote: "For everyone asking! No, it wasn't Jen she's been home with me safe and away from the psycho!"
Back in 2019, the MTV star was reportedly tasered and arrested after he allegedly assaulted his ex.
Most read in Entertainment
Ronnie threatened Jenn with a knife and “kidnapped” their daughter , according to the police.
He was charged with felony domestic violence, child endangerment, making criminal threats and brandishing a weapon.
He took a plea deal in the case, and was sentenced to 36 months of probation.
If you or someone you know is affected by any of the issues raised in this story, call RAINN (Rape, Abuse, & Incest National Network) at 800-656-HOPE (4673).
Jersey Shore's Ronnie Ortiz-Magro says he's 'very anxious' to date after nasty split from ex Jen Harley and ‘assault’ arrest