Complex sentence: In anger, Dame Devin accidentally blurts out that she killed Queen Isabella just so Delancy could be the princess, as a result, she is arrested, while a disappointed Delancy watches her mother get dragged away.
Split into simpler sentences: In anger, Dame Devin accidentally blurts out that she killed Queen Isabella just so Delancy could be the princess. As a result, Dame Devin is arrested while a disappointed Delancy watches her mother get dragged away.