O'Connor said the two had to split because of it, saying the two "both fell equally in love" but that she's "[b]een secretly f**king miserable as a motherf**ker since the second it started" and vowed to "[n]ever, ever messing with someone else's fella again."

"Its [sic] the most disgusting thing a woman could possibly do to another woman," she wrote. "And it smacks of zero self-esteem. So, back to the therapist for Sinead. For which unfairly, I may not invoice my parents."