Model Penna is quoted as telling a South American magazine that there is "no going back" as far as their relationship is concerned, after the pair recently split up for the second time in 18 months.
Penna reportedly told Caras (via the Daily Mail): "I left her simply because she is crazy. Katie's brain is not wired right, or the wires don't connect properly.
"I don't know what's wrong with her. I was thinking it over recently and one day I packed my bags and left. There was nothing else I could do. She was driving me insane... That's it, there's no going back."
Price explained in a statement issued on Wednesday (October 24) that the former couple had decided to call time on their relationship because of work and family commitments.
"Leo and I have had a lovely fun time for a couple of years," she said. "We will always feel deep affection for each other - but sometimes relationships just run their course... it was difficult for the relationship to move forward.
"We really wish each other nothing but the very best and will remain best of friends. Whoever [Leandro] eventually settles down with will be a very lucky girl."
Price also denied that her separation from Penna had anything to do with reports that she had been exchanging flirty text messages with District3's Dan Ferrari-Lane, saying that her contact with the X Factor contestant had been "entirely innocent and platonic".