Could it be? (A ghostly story of the image in the description)

As they all stood in the entryway, they gasped at the ghostly figure making her way down the stairs. None of them had been back here since that night 25 years ago when Ashley disappeared. It was February 22, 2050 and they had all gathered at the house to celebrate the memories of their friend where they last saw her. The night had been joyful all those years ago, and Ashley was in a great mood when they all retired for the night. But when they awoke, she was gone, never to be seen again. Amanda remembered seeing a figure dressed in white disappearing into the snow outside when she looked outside while in the bathroom late that fateful night. Now they stood there, watching her decend the stairs, dressed all in white. Could it be? It looked like Ashley, but she hadn't aged a bit in 25 years! And where had she been all this time? No one was sure if what they were seeing was real. The house was said to be haunted. Was this the ghost of Ashley? What had happened to her all those years ago?