Azalea posted a message on Twitter detailing the high-profile breakup: "I broke up with Nick because I found out he had brought other women into our home while I was away and caught them on the security footage."
Young and Azalea confirmed last week they were no longer together, as Andrew Joseph of USA Today reported. TMZ Sports noted the singer had all of his belongings removed from the house, but the reason for the split wasn't immediately clear.
Azalea denied that was the case, saying the information was news to her: "I have never even been told by Nick that his baby mother is pregnant, so if this is true I'm finding out via E! News."
She added: "This is just like a second shot to the chest. And I feel like I don't even know who the hell it is I've been loving all this time."
The former couple's relationship made headlines in March after Lakers rookie D'Angelo Russell secretly taped Young apparently talking about being with other women. The resulting video caused tension in the locker room, per Baxter Holmes and Marc Stein of ESPN.com.
Young has yet to comment on the latest details concerning the situation.