Baby mama drama! Jersey Shore Family Vacation star Ronnie Ortiz-Magro, 32, and his girlfriend, Jen Harley, took to social media in April following the birth of their first child, Ariana Sky, and accused each other of cheating. Now, In Touch has learned the reality star wants a paternity test to find out if he really is Ariana’s biological father.

"They had only been dating for a few months when Jen discovered she was pregnant," a source reveals. "Pals are telling him to get a paternity test."

If Ronnie, who is worth an estimated $3 million thanks to his reality TV fame and various endorsement deals, is the father, "He will honor his commitment," says the source. But there's no way he will change his mind about getting the test.

"He feels so angry and betrayed right now. He's determined to go through with it."