The mother more than likely DOES have them they're just harder to see, and that would explain why the babies have them, they're more than likely lice, and they like fleas can cause enemia so I would consult a veterinarian asap.
I think picking them off of atleast the babies would cause a bit of relief, Are there A LOT? or just a few? I would just call an emergency vet hot line just to see if there is anything you could do at home until vet care is possible... I'd definately ask questions about enemia..