That's good, hopefully she'll lay her eggs soon then. I see her pics and although she's a wee bit slender in the tail is not at all underweight. If you see the " hip" bones beginning to show, then she needs to eat a bit more in between laying. A breding female that is getting thin should never be housed with the male. The male should go in to a different tank and the female should be allowed to eat twice a day and have calcium on every other meal. They usually don't eat in the days before laying but whenever mine take more than 3-4 days to dig and decide to lay I offer them something just in case they're hungry. Once in a while they will eat but usually not.