Death days before wedding

Hi all, my fiance’s father has been ill since before we met in high school 9 years ago and the past 18 months have been significantly more difficult for him. He was admitted into the ICU this weekend with septic shock (among a long list of other things) and was just given a 20-30% chance of pulling through. They also said that even if he does pull through that he will likely been in the hospital for a long time before moving to a care facility, likely for the remainder of his life.

Our wedding is in 13 days. I don’t know what to do. No one has really discussed what would happen if he does pass before then (I think he may pass today) but I feel very uncomfortable with having the wedding immediately after this. I’m not sure what my fiancé will want to do and I already know his mom will be upset if we try to postpone. My parents are paying for the majority of the wedding and I think they would be very understanding, but would encourage us to still have it on the 22nd. I know this is something that my fiancé should probably have more of a say in if he is comfortable with it since it is his father, but I am very sad too. He is not my father, but he has been a father figure to me since I was 16.

what would you do?