Complex sentence: Chance's fiancée, Chloe Mitchell (Elizabeth Hendrickson), becomes increasingly concerned with Heather's intentions concerning him, and during a night of heated passions, Heather and Chance give into temptations and sleep together.
Split into simpler sentences: Chance's fiancée at the time, Chloe Mitchell, becomes increasingly concerned with Heather's intentions concerning Chance. During a night of heated passions, Heather and Chance give into temptations and sleep together.