babbling, yes, but...is this possible?

Is it possible for a five month old to already be talking? 

Most people would probably say no. I would have a month ago. But now...I'm not sure. I think Anastasia might be talking.

The frustrating thing is that it happened so gradually, I don't even know when it started.

It was a couple of days ago...last Saturday, maybe...when she was babbling while Matt was playing with her. She's only just started moving her lips when she babbles--it used to be all "mms" and "aahs," but lately she's started to make consonant sounds as well. So Matt, naturally, started encouraging her to say daddy.

"Dada," he urged, laughing as she cooed at him. "Say, 'dada.' Da-da. Yeah, Da-da."

"Da-da," repeated Anastasia, and laughed.

"Right! Dada!" Matt was thrilled.

"Dada." She giggled again.

"You said dada!"

I couldn't take it anymore. I was supposed to be napping, but I jumped up and ran into the room. Matt turned to me in excitement. "Did you hear that?"

"Yes!" I shrieked. "Did she really say that? She said dada!"

Anastasia smiled. "Begalumana," she agreed.

"Mama," I said to her. "Say, 'mama.'"

She just looked at me and smiled, and reached up her arms to be held.

But later that night, when Matt was getting her ready for bed, she started crying, and her wail took on a definite shape. "Maaaaaaaa-maaaaaaaaaaaa!" she cried. "Maaaaaaaaaaaaa-maaaaaaaaaaaaaa!" Was she calling for me? I jumped up and rushed into the room.

"Mama?" I asked her. "Did you say mama? Do you want mama?"

She spotted me, and immediately her crying stopped. She smiled up at me.

"Mama! Say 'mama'!" I urged her. "Here's mama!"

"Aaaaaaah," was Anastasia's only answer, which, in this case, definitely meant "I want to go to sleep now."

So what do you think? Is she talking?