Hi Bob
I'm so sorry I haven't had a chance to post for a while so have only just seen this on the other thread.
I am so so sorry sweetheart, what an awful thing to have to go through, you must both be devastated.
I can only agree with what everyone on here has already said, your guests will understand and frankly sod them if they don't. This time is about you and your dp, make sure you put yourselves first and give yourselves time to grieve, you'll have to go through the seven stages as in any other bereavement as you had formed your bonds, just make sure you don't shut out your dp as he'll be grieving too, try to take strength from each other if you can.
I can quite understand why looking after O is so difficult and if I can be of any help just shout, you can feel free to shout, scream, sob or throw a bigger tantrum than O has ever amanged if that helps, I'm always here to listen, whether it's now, next week, next month or next year. Sometimes it's easier to let it all out to someone who's not so close.
Look after yourself first and let your dp worry about O, they'll cope just fine and I bet O will try to be even cuter than normal as he'll sense you're down, let his innonence lift you back up when you can, he'll be a wonderful tonic when you're ready to embrace it & not being able to at the moment is perfectly normal.
Love, hugs & strentgh to you all Beks