My sister and I were invited to Windsor Castle to posthumously receive our mum's MBE. When we arrived, we were informed only one of us could receive the award. Upon hearing our story, the Queen made a special exception and allowed us both to meet her and receive our mum's medal. Although it was a bittersweet day for us, the fact she changed the rules just for us shows what an unbelievable woman she was. That moment and her kindness will stay with us forever.