I guess (hope) they changed the details. It's not uncommon in these cases to change the irrelevant details to protect the identities. I won't be surprised it her children are not 12-year-old or twins.
this is the New Yorker, the crown jewel of the conde naste empire and they wouldn't do that with their editorial process. Either it wouldn't be printed, the anonymity wasn't important or there were other people who fit her profile obscure her.