Regina was still living in Leopold’s castle though after she was banished. Snow and Charming had taken up residence in George’s castle.
I think Regina’s overall arc is that she will eventually give up her need for power. She will let go of the anger she feels and will be more than happy to let the Charmings rule while she and RH set up a house somewhere and co-raise Henry and Roland.
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"He was a lot of things to me" "The only conclusion was love"