Dom,
You might PM redoc since you may (and it sure sounds like it - fertile or not) be right behind him in timing and ask the he keep you up dated on any obvious observations and timings. I know it was extremely helpful to me to be just behind LEV with the Mercs since the experience was very fresh and it gave me vicarious observations just before they were about to happen.
Redoc has put out a call for experiences on aculeatus egg hatchings but has had not takers so it would be very future helpful if both of you would keep at least a weekly log. Keeping her eating is going to be primary in length of survival. The Mercs seem to typically last up to 5 weeks after hatching IF they eat (LEV, gholland and twice for me) but Jean reports that one of their (New Zeland) species dies before the hatching (don't worry, they can get out of the den they are SMALL, the large egged Merc are tick sized and can still get anywhere they want).
I will also make a small exception to Nancy's comment about them coming out of their dens to die. This was true of my wild caught Merc mother, Trapper, and many have reported aimless wanderings and day time sitings of night octos just before death but two of my tank reared did not and I never found the carcasses in a heavily rocked 45 gallon aquarium. Fortunately, the bio-load seems to be very small as there was never a spike or tank suggestion of the demises, they just "disappeared". I find this a bit odd since I have kept dead hatchlings of two species in saltwater just to see how long it takes them to "dissolve" (ie no clean-up crew) and even after two weeks, the corpses were easily recognizable, just dehydrated. This makes me suspect they are easily eaten after death and that the tank effect is very small. I know you have other critters to worry about but you did mention that Mr. 3 legs was already being consumed when you found him.
If you can't get Glove to come to the door for food, you might try sticking food on a stick through the door rubble with a small amount showing outside and see if she goes for it. Otherwise, try squirting some Cyclop-eeze into the den with a pipette. She will likely blow it back out (and may or may not eat some) but she will protect her eggs from the invasion and you will know she is alive.