I have two cats that are still the babies in the family, and as I type, one of them is sitting here with me now. I have a DD and two step sons. When my step sons first started visiting, the cats did not agree with it at all. They peed everywhere except the litter tray. The really amusing thing, and no, DP did not see it this way, was that after the kids went back to their mums, the cats would drag either the kids or my partners clothes into the litter tray and then poop on them. The cats ultimate act of revenge.
Needless to say, my partner was worried about the new baby. But some gems of wisdom from our vet soon sorted things out, and this was done before DD arrived.
We had problems with the cats getting in the cot and on the change table. Partner was not at all impressed. The vet told us that the cats like to be involved, to be able to see what is going on, but to also feel like they are safe from things.
So, we built a shelf in the nursery. This was for the cats alone, we put their blanket up there and in no time, they stopped getting in the cot.
When we bought DD home, they came into the nursery and got on the shelf. It was funny to see two little furry noses peering over at you, watching your every move, but also being out of the way.
Now, the cats come and sit with me during the night time feeds and they are always around with my DD. Mind you, they are still reserved about the step kids and still poop on their clothes.....
[Edited on 09/10/2007]