Mmm mmm good?

So, these days I don't know whether to laugh or be worried about Emma's communications skills. Giggling we defintely got. A couple of consonants occasionally. But mostly what we hear is a series of "mmm"s in varying levels. She's got her little lips locked up tight, top folded over the bottom, just mmmm-ing away. She's clearly expressing things. Are you happy Emma? Mmmm! Tickles? Mmmm. Playing with Mommy's hair? MMMM! Frustrated. M.M.M.M. Sleepy? mmmmmmmm... I tell her she's the queen of humming and so cute, but she's got to open her little lips to tell her story!