No, it's just grown up.
When the dragons are eggs/younglings, they need to get a set amount of views within a set amount of time for them to grow up. If they don't meet that amount of views then they'll die. Once they're an adult though they don't need to be viewed in order to survive, so putting it in her signature would be purely for aesthetic purposes.
She just made way for a new egg to be viewed, so that one can grow up and hopefully survive to adulthood.
I actually know what kind of dragon that egg is going to hatch into. I had to double check the DragCave wiki just to be sure, but I was correct none the less.