And Death Shall Have No Dominion

In this SND novella, Catherine is alive, but only Diana knows of her survival. Diana has kept that knowledge to herself, theoretically in case Catherine did not recover from her illness and traumatic amnesia.  The author's flier states Diana is "torn between the voice of her conscience and an impossible love". Catherine escapes from the hospital, finds her way back to the tunnels and is reunited with Vincent. Gabriel also survives and is on the hunt to kill all who thwarted him.

The R rating is more for violence than steam.