My niece also says i don't know Evan though she actually does know.
She will ask someone to read it for her.Sometimes i read to her some parts and ask her to read it for me.She does not have confidence in her to read without someones help.
I think sometimes it may happen due to confidence or sometimes babies just don't want to grow up too soon.They love to have their parents do stuff.
http://www.babycentre.co.uk/a556441/helping-your-child-to-be-confidentkids learn things from the way we communicate with them..they may not read the way we want them to but we can communicate with the way we want...
To make the kid read phonetically try the words the baby doesn't know than the words she knows...it may be of help..
