I can see where she gets her sense of Humour from Kelly....LOL
But yah I must admit, Its very creative of her!!
I also think that she is unsure how to react to the new family to be...specially when she was the centre of attention for 6 years!!
I agree with others she needs special attention every so often so that she knows that she will always be special girl to you! I dont think she is ready to share you with sooo many people!
She will come around tho ...you handled it quite well!!