Spider Part 3

My Kitchen Window Spider caught two winged termites over the past few days.  She didn't seem to be doing anything with them at first, but today she began eating one of them.  I watched her off and on over several hours as she gorged herself.  Her body grew enormous, round and taut, larger than the first egg sack she had laid last week.  It was shiny in the light of the kitchen through the window.  I kept thinking her body was another egg sack, and hoped she wouldn't explode.  I expect she will lay her eggs tonight while it is dark.  I wonder how many sacks she will create before she expires?