Complex sentence: It was during this time that she met Don Draper, who was writing ad copy for a fur company she modeled at-he began courting her by buying her the fur coat she wore at a shoot.
Split into simpler sentences: It was during this time that she met Don Draper--he was writing ad copy for a fur company, and she was one of their models. He began courting her by buying her the fur coat she wore at a shoot.