Agatha Harkness Daughter!?

In this universe Agatha had a set of twins. She sacrificed her twins to receive the Darkhold. Which she deep regrets. Rio who we believe is the embody of Death didn't have the heart to finish the job. Killing Agatha's son overwhelmed her with guilt which lead her to raising Agatha's daughter. She is named after the most feared and powerful witches. Salam harkness. She is tired of hiding and curious about her mother.