Here via a rec and OMG so glad I clicked. Former clinical social worker who usually avoids fics like these but this is SO WELL DONE. I don't know how much experience you have with DID folks but this is pretty spot-on from a clinical stand-point.... and from a writer's perspective, it's tight, well-paced and the unfolding of the S/D relationship is just lyrical. This is definitely a new favorite of mine.