The Irish singer, who was hospitalized over the weekend after a lengthy Facebook post indicated she may have overdosed, posted a new NSFW message on Monday calling out several people who she feels have wronged her.
"Jake, Roisin, Jr., frank, Donal, Eimear, I never wanna see you again," the singer wrote. "You stole my sons from me. Then you had hypocrisy to come to hospital and then not be here when I wake and not pick up phone? I'm sh*t to you. You're dead to me."
"You left me alone for twelve weeks," the post continued. "Why did I have to hear it was your hypocritical asses here while I was unconscious?? And now you're Gone and not picking up phone?... I never want to see or hear from any of you again."
"Why were you here when you're the ones who put me here," Sinead concluded. "And where the f**k are you now??? Murderers. Liars. Hypocrites. All of you. You caused this."
The 48-year-old was placed on suicide watch after her initial post, with local reports claiming the singer was "safe and sound."
"I don't matter a shred to anyone," she wrote in a troubling message over the weekend. "No one has come near me. I've died a million times already with the pain of it. So yeah.. Strangers like me.. But my family don't value me at all. They wouldn't know if I was dead until weeks from now if I wasn't f***ing informing them now."
ET has reached out to O'Connor's reps for comment in this developing story.