Dragonfaer, welcome to WaB and well done for helping the hog family. One thing that concerns me is that the babies are too young for this time of year. Hedgehogs need to be at least 800g at this time of the year in order to survive the hibernation and those babies are certainly below that weight. So, I'd suggest you to contact your nearest hedgehog rescue center for advice in this link here:
Hedgehog Carers
The main risks are:
1) Mum goes on hibernation or dies and stops providing food for them
2) Babies leave nest and won't survive the icy winter
3) Babies go on hibernation without enough fat reserves to stay alive and die afterwards
So it's crucial that you contact the experts while the family is still together and can still be rescued and saved. You've done very very well so far, now you need to consider their welfare and their future. Hopefully everything will be fine.
Good luck.
Marcia.