I don't know for sure if this is where it came from but simple googling brought me to this article-
Words, actions of Jason Young's daughter enter his retrial
Read more here:
http://www.newsobserver.com/2012/02/18/1864401/childs-words-admitted.html#storylink=cpy
Palmatier said she called another day care worker over to the table, and they just watched as Cassidy put the dark-haired doll, the one she referred to as "Mommy," face-down into a small toy bed on the second floor of the multistory dollhouse. "Neither of us really knew how to respond," Palmatier said.
Later that day, she said, Cassidy again spoke of her mother without any prompting. She awoke from a nap and started talking.
"She said, 'Mommy's in the bed, boo-boos all over,' " Palmatier continued.
Then, with no apparent reason for changing her conversation stream, Cassidy began talking about farm animals and "Daddy bringing them fruit snacks."
Read more here:
http://www.newsobserver.com/2012/02/18/1864401/childs-words-admitted.html#storylink=cpy