Get her a moist hide/egg laying bin. Then leave her with teh eggs while you get an incubator set up. Mom will incubate eggs just fine on her own till you are ready to incubate them yourself.
Looks like the female is indeed gravid, and the person you bought her from missed it.
Do a search on build your own incubator, you find tons of them out there. It only takes about 20 minutes to set up an incubator, once you have everything you need. OR you can buy a hova-bator...though if your snake lays in a clump it may not fit, so probably better to just make one.
I made my incubator out of a 70 quart Coleman's cooler, 15' of heat cable, thermostat and some plastic grate picked up at a hardware store, typically used for florescent light covers. Tape the heat cable on the bottom of the cooler, (feed the non plug end through the water drain at bottom side of cooler, saves on drilling another hole) The probe from the thermostat and thermometer can go through same hole. Tape around the outside so they dont' pull out accidentally) Cut the plastic grate to form a layer a few inches above the heat cable then another one that is about half way up the cooler (or could squeeze a third shelf if you like, just make sure you have room for egg containers).
On the first layer right above the heat cable, I put a long dish which I fill with water. The second shelve I put the deli dish (or other container) with eggs in incubation medium with its own lid to keep in the humidity. A couple holes are poked into the lid to give ventilation.
It has worked good for me so far...but only had one clutch in it (of corn snake eggs). But it hold temperature pretty good.
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PHLdyPayne