some u cant even tell what sex they are even in person,your 2 females are obviously not,lol,unless ones name is mary and it has had a immaculate conception
blueys normally givebirth to all on the same day,though as jeff mentioned,there are exceptions,why have u got her in a dark spot,she can still be in her usual spot with heat lights as normal,so she can regulate her body temp,the darkness could be stressing her,and if temps arent available to thermoregulate on top of that,that could prolong her having the rest
my suggestion is keep her as u normally do ,shes comfy there and in a familiar spot,other wise try and set her up with similar conditions in regards to light and heat ect
sometimes they can have difficulties giving birth,especially if there are unfertilised ova in the mix,its always a stressful time for them,so no need to add more stress to them,just watch her for a few days and if they dont come perhaps theres a difficulty they may need veteniry assistance,the longer they are in there,the more risk there is to mother and babies
i let mine have babies in with the male/s other females other species to,usually thats fine to do to
good luck with them,would love to see pics of your animals to and please keep us posted on how she goes,its an exciting,plus stressful time waiting on babies,lol