Is my daughter ok??

SU

I know copying is something all kids do but when I say my 2yr old literally mirrors her big sister, its starting to get weird. She does everything she does! Even down to saying the same thing her big sister just said. I usually let it go but tonight after dinner they had their cups of juice and my oldest bumped her own cup and spilled her juice so i gave her a paper-towel to clean it up. And my youngest purposely dumped her cup out right after! then went to get the paper towels.

Is she ever going to stop this!? Lmaooooooohelpmeooooo