Di,
My prayers are with you and your ex's family. Losing someone is so much harder when it is sudden. Your mind can't begin to grasp the idea for a while.
How wonderful that you maintained a close friendship with your ex. I have 2 ex's and one is a great friend the other a stinker. It isn't easy to stay friends but it can be done and I'm sure you provide him and his family with much comfort.
Loving hugs to you and all hurting from this loss {{{{{{Di}}}}}}