Complex sentence: The marriage brought Carla into regular contact with Tiffany as Bernie's brother Billy was dating Tiffany at the time.Carla attempted to drive a wedge between Bernie and his brother Billy, making it appear that Billy was after Bernie's money.
Split into simpler sentences: The marriage brought Carla into regular contact with Tiffany as Bernie's brother Billy was dating Tiffany at the time. Carla then drove a wedge between Bernie and his brother Billy, making it appear that Billy was after Bernie's money.