Complex sentence: After their elopement, a faction of the Don Pedro's court wants him marry Bianca, a Bourbon princess to avoid a civil war, and he appears to be negotiating this despite his secret marriage to Maria.
Split into simpler sentences: After their elopement, a faction of the Don Pedro's court wants him marry Bianca, a Bourbon princess, in order to avoid a civil war. He appears to be negotiating this, despite his secret marriage to Maria.