Robin Roberts delighted fans with a new photo she shared on her social media of a rarely seen member of her family.MORE: Robin Roberts faces worrying time concerning much-loved rescue dogThe Good Morning America host posted on Instagram a picture of her niece's daughter, Salleigh, as she smiled for the camera with a book in hand.WATCH: Robin Roberts shares emotional prayer with fans as she honors 9/11 anniversaryRobin revealed that she shared the picture for a heartfelt reason as she explained