She may still be a little bit defensive for a while because of the babies, but if you reward her and pet her before investigating the babies she should do well with you interacting with them. At the moment for the babies, mostly make sure that they're eating. They'll only feed once or twice a day in the morning or evening and their bellies should look like round ping pong balls!
Is the nest that she made in a box or anything? Or is it just sitting open in the cage? It might be worth getting a cardboard box (like a shoebox) big enough for mum and babies and carefully transferring the nest into it so that the babies can't crawl all over the cage, I've been told they can be quite the climbers. I think that should be ok to do, but might be worth hearing the advice of some actual breeders but I think moving nests into a box is ok.