*I am wondering how it would be best to organise SC spending time with their sibling once it's here, as currently they usually go with DP to stay at PIL's for their weekends with him. This is partly due to distance (mum moved far away and PIL live in the middle of us), as well as DP&SS attending local football matches, giving them time with their grandparents and also because we don't have masses of space here.
My initial thought would be it could continue like this after the first few weeks and I could take the baby there for, say, the whole day Saturday, but I'm also worried I'll struggle doing it all myself without DP around on the weekends...but if he is there, that's three kids to manage! Obviously. So I think doing 2 nights alone might be the lesser of 2 evils for me.*
Well from a MN perspective- this would be the ideal as he's putting DC at forefront but I will say having had a baby (and im no bloody expert) it's hard and sadly completely dependent on the baby you get. You may get a sleeper or you may get a screamer. It won't be anything you have done just some babies are more difficult to handle and you won't know until your there, so my advice would be to plan for both types of babies and agree with DH. You plan will work if baby is "easy" but even then it will be hard. Nights and especially sleep deprivation does something weird to the brain.
My friend had two amazing sleepers and her third omg her third screamed. I would send her for a nap and take the little horror for a walk in the pram (he screamed the entire way every time ) and she would say even when he was gone she could hear him screaming. Her partner was in the army. Have you joined a NTC group, they are invaluable in terms of the first year with baby, army of women who all bloody aren't sleeping who you can text and say, omg I think I may have dropped phone on babies head because I'm so tired. That type of tribe, they have shelf life of course but really saved by bacon.
Have a what happens if I get baby blues (they can really sneak up on you) you can be happiest pregnant person and get hit with that stick hard. Plan for it it.
Who can help if DP keeps to current routine and you just reach boiling point can you call ? Get a list of names, explain the situation as most people who have a baby know what it can be like. Get a back up back up plan in place is what I'm saying and ignore your brain telling you "don't ask for help" bloody ask for help !! Mum guilt is bad enough.
I'm in similar situation and it will work well if everything goes ok and baby is like DD but I hold out little hope. Sod's law and all that. Remind him and yourself that any arrangement will need to flex for you and the baby not just SC.
Re taking baby to see SC a day there seems reasonable actually, if the drive is long, depending on interest you can up and say you can have a sleep over if they like (and if that can be accommodated)
Now I'm sure someone else will come along with some other idea but those are my few tips !