Emily is a Witch in an apocalypse novel

Emily lived in a world akin to hell on earth for 12 years before dying a gruesome death. She wakes up in a body of a pregnant woman who had just slept with the novel's male lead who would in the future imprison her and their child will grow up to call the female lead 'mom' not knowing anything about her. She makes a decision to never mix with the main story's couple by taking a morning after pill. However before that, she had discovered a space jade and drank the spirit water inside which strengthened the informed fetus rendering the pill useless. The space comes with an inheritance to become a witch. She accepts it since this world will become like her old world and even worse in a month. Suddenly she has to create the school of witch craft, raise a child and avoid his father while building a safe place in an apocalypse. Emily looked at the report with tightly knitted brows. "I turned that dog man's low quality sperms into a super baby!"