When I was super Young a similar thing happened to my close friend ( not murder ofc) one day we were playing as usual and the next she was never the same. Could barely speak and was bedridden. I remember her dad calling to ask me to Come see her again after a while. He never called before and I never came.  TIL this day the guilt eats me alive. I was so traumatized that I locked myself away for years but they didn't know , she didn't know. So to see the aunt ask sei if he'll play with him again and for him to breakdown in response , needless to say , broke something in me. I'm not sure but now ,i think it's far too late to call back.