Complex sentence: Bechstein begins a relationship with an insecure young woman named Phlox Lombardi, but as his attraction to Arthur grows over time, destabilizing both relationships and revealing his possible bisexuality.
Split into simpler sentences: Bechstein begins a relationship with an insecure young woman named Phlox Lombardi. As his attraction to Arthur grows over time, it destabilizes both relationships and reveals his possible bisexuality.