Honestly, it could be a lot of things. Could be doing it because she needs space; she could be doing it for a reaction; she could be doing it because she's crazy. No one knows and SHE might not even know.
It's important that you just accept it and detach from the WHY. Trust me, you don't want to know what's going through her head right now. Just validate her and leave her be.
Focus more on you and let her wonder what YOU are up to. Make her "Curious" as to why YOUR doing things differently.
Might not be the answer you want, but I hope you understand.
