Kate Middleton praised a teenager cancer fighter for inspiring her and husband Prince William for her strength as she battled the cruel disease. The 42-year-old’s first public appearance while undertaking royal duties saw her hosting sporting heroes at Windsor Castle. Kate Middleton had invited the photographer, 16, to take pictures of the meeting and was inspired by her story. The Princess of Wales had stayed away from the limelight for several months after a routine surgery for an undisclosed health issue led to her being told she had cancer. She was first seen in public in the summer for Tr…