UltimateCSP, I don't think is even an issue. Check out these set of rules by NADRA for different cases regarding CNIC issuence. Apparently, she'll only need the CNIC of any of her living blood relatives and Birth Certificate Or Matric/ School Leaving Certificate Or Citizenship Certificate from Ministry Of Interior(MOI).

http://www.nadra.gov.pk/docs/cnic_checklist.pdf