A cats labour needs to be left alone!
those first moments are vital! you have to keep a fair distance if you are close to the kitties then she might not care for them anymore (she'll abandon them!)
And even though I have cared for kittens almost from the start (Jenny(exJenny she died as an adult kittie (she was katnapped!) wah! :doubt:

& Bel)
It can be hard and very tough
You should give her a cardboard box (cats like dark and cozy)
Not too spacy and not too bright and an old towel inside would be just purrfect!
Then when the kittens have their eyes open and start to get adventrous buy em (mother & kits) a nice cat bed because the cat won't bleed and the kits won't poop in their bed anymore! and you'll have one happy cat family! what you do next then is up to you!