Bravo star Mellencamp, 43, shared her terrifying diagnosis in a social media post on Feb. 12, revealing that the tumors were discovered after she went to the hospital to get treatment for "severe and debilitating headaches" that had been plaguing her for "several weeks."

In addition to Slate, Arroyave and Mellencamp also share 4-year-old Dove and 10-year-old Cruz. While the Real Housewives

Mellencamp, the daughter of the rock musician John Mellencamp, said on Instagram that she was receiving treatment after experiencing “severe and debilitating” headaches.