I have 2 cats, both mostly indoor. DCat1 is a Burmese and a big dafty, but she sometimes goes for a mooch about the garden. DCat2 has some health problems, vet recommends she stay inside. DCat1 is 12 and a lovely chilled out old girl. DCat2 is 9, is much more highly strung, and she has been very unhappy since my DS came along.
He's now 2 and she is terrified of him. He's loud and if he sees her he sometimes chases her out of excitement (despite my efforts to prevent it). He is good with our other cat (as good as a toddler can be!) and we supervise him closely, teaching him to be gentle, not to shout etc. He is getting better but he's still quite little, and DCat2 just seems to really hate his noise and galumphing about. She won't be in the same room as him - she runs away as soon as she sees/hears him, and we often don't see her until after DS goes to bed. She spends most of the day hiding 
I'm now pregnant with DC2 and I'm really worried about how DCat2 will react to another child in the house. We have stair gates that she can get through, so she can always escape, but her favourite hiding place, our spare room, is about to become DC2's room. Our house isn't huge so there are only so many places she can hide. I've tried letting her have some time in the garden with DCat1, just to give her some space, but she hated it.
I fear her life has become a bit shit recently, and it's only going to get worse when DC2 arrives. I don't know how to make it better for her 
Has anyone had similar experience since having DCs? Any advice on how to manage the situation would be most welcome.
Gosh, sorry for the epic post!