During an interview with Good Morning America on Monday, Blac Chyna spoke out after her ex, Rob Kardashian, took to social media to go on a tirade against her, posting nude photos of her and claiming that she had cheated on him and abused drugs.

“I was devastated, of course. I’m like, how could somebody, like, post these pictures of me? And I’m like ‘Wow, okay.’ This is a person that I trusted. I confided. I felt comfortable, you know, with even sending these pictures and even talking to him about certain things, you know,” she said during the interview. “I just felt … betrayed.”

Now, Chyna is working with attorney Lisa Bloom to take legal action against Kardashian.

“Mr. Kardashian, you are now on notice: revenge porn is illegal. Cyberbullying your ex is harassment. Chyna ended your relationship months ago and she has the right to live as she chooses, work as she chooses, dress as she chooses, and be intimate with who she chooses,” Bloom wrote in a statement released Friday.

“Chyna and I both believe that this is an important women’s rights issue, as too many women and girls have been slut-shamed by exes. It stops now. Your attempts to shame and control her are hereby rejected. Her body, her choice. Her life, her choice. Back off.”