one of my mums is always with her babies, but the other one is not so motherly should i say lol she washes and feeds them but she doesnt even sleep with them now, but as this is her first litter she may just not know what she's doing properly, plus she lost her mate just before peregnancy, but they all seem fine, they were getting a bit cool without mum so i put a little fleecy thing over them and she just goes in and does what she needs, and also she takes them out alot and does leave them lying around occasionally, but i just keep a close eye on her and make sure they're where they're supposed to be lol so as long as your mum is feeding n drinking and babies are squeaking they should be fine. try putting some cut up apple in and blow the smell in her nesting box or peanut butter,

my bitsy comes straight out to see what i'v got when i do that lol
my nesting boxes are coloured plastic houses (actually they are chinchilla sand boxes really) so i can see through them to keep an eye on them. my bitsy is very friendly so she lets me put my hand in, but the other one (angel) wouldn't tolerate my hand in while she's in there,

but she'll let me take the babies when she's running about.