Albus - what a fantastic name for a kitten. Much better than Young Farmer Kit.
Please - as Gill says - don't apologise for a lengthy post. The devil really is in the detail with these sorts of things, and as much information as possible is the way to go, which is one reason I think a journal helps to pinpoint what sometimes seems to us as "random" behavior, but to your cat couldn't be spelled out much more clearly, hence the frustration when neither gets the point being made.
So, having said that, could you give us more detail? What is your average daily routine? What time do you get up? What used to happen at that time of day and how has that changed? What happens in the average day? You'll need to ask your OH for his input here, and it will have to be committed - so he'll have to think hard about what happens now, and what happened then.
It's really
really useful to take it absolutely from:
"I get up. I slip my dressing gown on, I go to the bathroom. I have a shower and brush my teeth, I pop in to check the twins (didnt used to do that, used to do.......?"
Step by step, talk yourself through the average day, and the average weekend. Every single thing of your normal routine, before the twins came along, and after the twins. Write it down, because otherwise you forget. (Babies delete things from your hard-drive sometimes without meaning to
)
Doing it that way will help to highlight "minor" differences, some or all of which may be conspiring together to make Nora unhappy. What seems negligible to us, can assume huge significance to our feline companions. By looking back over those things, we may be able to make some suggestions.
With Zylkene, if Nora won't take it sprinkled on top, trying mixing it in with the meat completely. It usually disappears within a minute or so of adding it to the meal. Does Nora have an absolute favourite food or treat that she just adores? (Our oldest, Moray, isn't food motivated, which makes it difficult if you need to medicate, whereas one of our Gurlies, Barley, will eat anything and everything.)
It's interesting that Nora likes her food treat toy, as that clearly absorbs her and diverts her attention from the things that make her unsettled.
Sometimes, it's a fact that cats prefer being single cats in a quiet household with no children, but again, I take my hat off to you for looking for solutions, because it would be lovely if we could help you get to the bottom of Nora's unhappiness and restore the balance.