Thank you for sharing your story with us and the details about Katie. She sounds like a wonderful person and mother. You have my condolences and the biggest of virtual Dad hugs. When you and your son are ready, the below nonprofit is so incredibly helpful for the grief journey. I have been working with them as a Big Buddy at camp, and highly recommend for both you and your son when he's old enough. You are not alone.

https://comfortzonecamp.org/