My cat went through this when DD was born, she weed in all sorts of places.. car seat and even once in the cot (new mattress required so I was v v v tempted to commit cat murder)
She stopped of her own accord once she got used to the new world order.
But for a while we were super vigilant in covering things up, storing things upside down and keeping various doors closed! We also had a couple of cat nets on cots and big stuff with fabric in them.
I second the Feliway diffuser (and possibly the spray too, if cat comes back to specific places)
Agree that a tray should help too, there are various things you can used to fill it not just standard litter, there are paper, wood and special crystal versions of cat litter. If cat is very nervy you can get one with a roof, which is also helpful in discouraging toddlers from investigating!
If you don't like the idea of a litter tray in your kitchen then put it in the loo/bathroom or somewhere convenient for you. Our cat has hers in the bathroom and that works just fine for us all.
Might also help to chat with the vet in case there is something else going on with your cat?
I'm sure you already know this but just in case.. if you clean the wee up with bleach that will encourage more cat wee. There are several suggestions of other things to use but I had a spray bottle of stuff from the vets which was really good at neutralising the horrid cat-wee-whiff!
Congrats on DC2 and I hope you manage to work things out with your cat 