There's been talk forever of people, towards the end of their lives, dreaming or "seeing" people who have passed.
Todd had the experience with both his Mother and his Father, who died so recently. My Mother saw the rabbi's wife from 45 years ago when she was in her last day. When I asked her why was she seeing Mrs Livitsky, of all people, she smiled, shrugged her shoulders and said, "Because she's there."
So whether you believe or not, here's a compelling Ted Talk from someone who's been there to see what goes on many, many times. Enjoy