G.O.O.D. Music‘s Big Sean has some explaining to do. The rapper’s ex-fiancée Naya Rivera claims she caught him with his now-former girlfriend Ariana Grande during their engagement.

In her new Sorry Not Sorry book, Rivera does not hold back on exposing her personal relationship with Sean.

“We’d been fighting for five straight days while he was traveling, and then on the one day that he was back in L.A., he said he didn’t want to see me,” Naya writes in the book. “‘Well, a–hole, I’ve got a key to your house,’” Naya added about what she was thinking back then. “I walk in, go downstairs, and guess what little girl is sitting cross-legged on the couch listening to music?… It rhymes with ‘Smariana Schmande.’” (Just Jared)

Naya also revealed Sean called off their engagement without telling her.

“I learned that I was no longer getting married from the internet, and at the same time as the rest of the world. Not only were we no longer getting married, but apparently we weren’t even together anymore,” she said. (Just Jared)

Last year, Big Sean responded to Naya accusing him of stealing a Rolex watch.

“You can come to that conclusion yourself if you just look at the facts,” he says before pausing and then letting out a laugh. That’s probably why he says he wasn’t shocked by it. “I felt like it was unnecessary drama ‘cause in my eyes it wasn’t true. I wasn’t surprised by it,” he says with another long laugh. “Even though I didn’t steal anything, I wasn’t surprised by it.” (Complex)

The G.O.O.D. Music stud also talked about his romance with now-former girlfriend Ariana Grande.

“We started as friends,” he says. “I’d never done that. Usually you meet a girl and then start dating. We always saw each other in the studio, and we’d talk about songs we were working on. It was cool to have a girl that I could talk to about my problems. I did that with her. It’s not some fake-a**, inauthentic sh*t when I say we were friends. This is something special and I appreciate every moment of it.” But what about the pressures that come from dating another celebrity? Finding time to see each other? Having your love life in the news? “I don’t think about it like that,” Sean says. “You can’t be afraid, because when you’re afraid you don’t give it your all.” (Complex)