That's a big cage. What's the humidity reading in there?

If you want to go the maternal incubation route, I would definitely look into giving her a lay box (basically just a roomy humid hide). Ideally, this would have been provided to her long before she laid but since you thought she was male it would be a late addition to the enclosure. You would have to remove the female and move the eggs to the laybox in order for it to work out. The laybox would provide a better ambient humidity for the eggs and make brooding easier on the mother.

I would also go ahead and build or buy an artificial incubator and have it up and running just in case the mother abandons her clutch. Hope for the best but prepare for the worst.

Here's a link to my first year breeding ball pythons. I maternally incubated in a 40g breeder tank and gave my female a 30qt sterilite tub to use as a lay box.
http://www.ball-pythons.net/forums/s...threadid=95885


This year I'm maternally incubating again but my brooding females are in a rack system and tubs hold humidity much better than tanks so making lay boxes wasn't a concern. Two clutches have already hatched and I've got my third and last maternally incubating now.
http://www.ball-pythons.net/forums/s...d.php?t=120144


Good luck with them.