The timeline alone does not ring true for NG to bear responsibility for Toni's suicide attempt. She ran one show about it June 11. Toni went out drinking July 2, returned to her mother's house, and lit herself on fire. Three weeks later. That doesn't lend itself to NG's story being what broke her, or the final straw. Perhaps there'd be a little more argument to be made for that had she been watching NG's show, turned it off, then lit herself on fire. But not three weeks later. (Although that still would've been driven by many factors) People don't belatedly snap from a trigger, 3 weeks later.
If someone went drinking with her that night, or enabled it, even after her 2 DUIs and the death of her baby, they bear more responsibility as contributing than NG does.
IMO, the family is in pain, from the lose of Toni & the baby, Toni's drinking problem and her choices, and perhaps from any enabling deep in their hearts they feel they might have done, or any missed chances for intervention to save either one. Not that the family is responsible for Toni's choices. But that would lend itself more easily to trying to point to someone else as being responsible or playing a role in her death.
I wish Toni had made different choices, for her sake and many others'. She was created with a purpose and I'm sure had gifts and talents. Wish she'd used the county help to address whatever pain fueled her drinking and its aftermath.