Complex sentence: It is discovered that this is because Misao is pregnant with a demon child with strong powers, and despite that the baby could kill her during childbirth, she insists on giving birth because she has grown to love her unborn child.
Split into simpler sentences: It is discovered that this is because Misao is pregnant with a demon child. Despite being told the baby could kill her during childbirth, she refuses to abort it because she has grown to love her unborn child.