My cat had two kittens this morning (Or possibly in the middle of the night). She has been nursing them but seems to want to be downstairs with us and not with them, I'm worried they feel a little cold, and they are screaming very noisily and scrambling around over eachother in search of her....I dont know what to do, I'm really worried.

She normally goes out, but I put a litter tray up with her, but she hasnt used it, and she has just escaped out of the front door as my mother in law left.

Is it normal for her to leave them like this? She does go back....but is it ok for them to be so noisey and seemingly upset? They are only hours old....
Also....just to add. She has had them in the bottoms of my daughters walk in wardrobe behind the boxes of Pyjamas, I cant really leave them there as our 3 and 1 yr old sleep there and I cant trust the younger one! Is it ok to move them? Mum seems very trusting with us.