Molly Parkin College, London, and then a scholarship to Brighton College of Art. After marriage she became a teacher, painting throughout this period. After a series of affairs, including a long-term association with James Robertson Justice, Parkin separated from her husband at the start of the 1960s; at this time she lost the desire, inspiration and passion to continue with her artwork. To support her two daughters, Parkin turned to fashion. After making hats and bags for Barbara Hulanicki at Biba, and working alongside Mary Quant, she opened her own Chelsea boutique, which was featured in a "Newsweek" article about Swinging London.
Biba on the Saturday morning it opened; "...the curtains were drawn across the window… the shop was packed with girls trying on the same brown pinstripe dress in concentrated silence. Not one asked if there were any other styles or sizes," Hulanicki remarked. The brown pinstripe dresses were being stored in the shop because Hulanicki’s apartment was overflowing with boxes of clothes for their mail order service. Fitz-Simon dropped Hulanicki at the shop and went to pick up more dresses, Hulanicki went to the bathroom and when she came back the shop was packed. "The louder the music played the faster