I forgot to post about this earlier, but I think it was just a fluke anyway. Yesterday I had Morgan in her high chair in the kitchen while I emptied the dishwasher. I turned around to look at her...she looked right at me and said "Ma-ma." I got so excited I ran over and kissed her. She's been saying something that sounds like "mom-mom-mom-mom" for a while...but this time it definitely did not have the "m" sound at the end of it. It was a clear "ma-ma."
She wouldn't say it again though, and hasn't said it since. Who knows...even if she didn't really mean it, it was nice to hear it with her cute little voice.