The Ugly Swan by Jilly Cooper

Gawky Jessica has always been overshadowed by her gorgeous older sister, Helen. Finally out in the big wide world on her own, Jessica is determined to forge her own path as a journalist - but she can't quite forget the feelings she had for Danny all those years ago. Danny was one of her sister's many admirers, but he always had time for Jessica, who fell for him hook, line and sinker. When a chance invite to the most glamorous party of the year means their paths will cross once again, Jessica is determined to show Danny that the gangly ugly duckling he remembers has finally grown up.

Part of the Storycuts series, this short story was previously published in the collection Lisa & Co.