Hidden surprise

A beautiful young woman floated up the aisle looking every inch the conventional bride. Her proud husband-to-be looked over his shoulder and smiled at her. Their friends and family sat down and the minister began the wedding ceremony. Nothing unusual here, I hear you say...
But as the happy couple reached the door of the Mill Forge as man and wife, the bride looked towards me and winked. She raised the hem of her dress and nodded towards her feet ... "It's the rebel in me" she whispered!