if she popped them out with no problems then that's the really difficult bit done, yay!
congratulations to you & momma cat
i feel some spooky names coming along!
as long as she is somewhere safe & cosy & is suckling the bubs then it's best to leave her to it for the first few days.
kittens don't need much intervention from humans unless there are any problems
make sure momma has plenty of food & water & that she is using the litter. if she goes off her food or has trouble with toileting then do keep an eye on her in case she has retained a placenta, but hopefully all is well.
leave her bedding as it is for a day or two, so she has the birthing smells to help her bond with the babies before you give her clean bedding.
sit back & enjoy! if you have any concerns be sure to ask, or call your vet if it's anything serious