Did Stella say daddy? I didn't hear it =)

There are a few words I swear Stella says. I know most of you probably think I am a kook for saying she says anything at 4 months besides the normal baby ramble. The words I FOR SURE know she says are:

yeah
hi
k- like ok

Now, she of course doesn't use the words within context but it is funny to hear her say 'real' words. The other day I thought she said dada then daddy then dada again. I was a little taken aback. Seeing as Stella and I have an understanding that the first parent she was allowed to say was mama or mommy. Therefore, I am going to pretend I never heard the 'D' words and continue practicing with her on her 'M' words =)