What we heard Kayla say the first time:
"Ms Frog had a baby snake."
Process of elimination:
Someone had a baby snake?
Kayla: No... repeats her sentence.
Joe: The frog had a baby snake?
Joe: A shake?
Me: Oh, Mrs. Vaughn?!
Lucas: She's saying Mrs. Vaughn had a baby snake.
Kayla: No! Mrs Vaughn had baby snake!
Joe: Snake? Shake?
Kayla: NO! Baby snake!
Me: OH! Ms Vaughn had baby JAKE!
Mrs. Vaughn is Kayla's ST in school. Back in Feb she gave birth to her son, Jake. From the rest of the conversation Kayla was able to tell us that Mrs Vaughn brought baby Jake to school and Kayla got to hold him and Mrs. Vaughn took a picture.
Usually we can understand Kayla, but there are still times with some of her enunciation of words, that we play a guessing game as to what she is saying ...and we end up with a conversation like the one above.