No, not Granny (I mean, who would bang that, even if humanity was nearing extinction, and its survival depended upon her getting preggers).
It's a Granny Warren aide he was laying pipe with.
Petraeus' wife is chums with Granny, and that Granny had his wife on her payroll.
Here is the current staff at the CFFB...........
http://files.consumerfinance.gov/f/201209_CFPB_org-chart-horizontal.png
Wondering if the chippy is on this list....