She added that he was holding it together as best as he could.
But the last month he could not.
It was like the dam broke, Williams said.

Credit: Theo Wargo/Getty Images
Frequently misdiagnosed, its one of the most common forms of neurodegenerative dementia after Alzheimers.
If only I had called him, Williams told Robach.
And Im thinking, No one could have done anything more for Robin.
I just want everyone to know that.
Everyone did the very best they could.
This disease is like a sea monster with 50 tentacles of symptoms that show when they want.
Its chemical warfare in the brain.
And we cant find it until someone dies definitively.
There is no cure.
The 63-year-old actordied by suicideon Aug. 11, 2014.
In my opinion, oh yeah, she said.
I mean, there are many reasons.
Believe me, Ive thought about this.
And I think he was just saying no.
And I dont blame him one bit.
I dont blame him one bit.
Watch a clip of Williams interview with Robach below, and see thefull interviewat Yahoo!
For more on her husbands battle with Lewy body dementia, read Williamsinterview atPeople.