Life insurance. Responsible people have at least 10 or 15 times their yearly salary in life insurance. Most people are literally worth more dead then alive.
Not saying this is the case here just pointing out the possibilities.
We know that Huma has at least one sister [who has an apartment in NYC].
So if Huma, her sister, and her mother each received $1 Million [and if there are no other siblings], then that's a $3 Million life insurance policy, and, if you're correct in the factor of "10 or 15 times", then Huma Abedin's father would have had to have been earning $200,000 to $300,000 per year, circa 1992, as an academic in the social sciences and the humanities.
That's simply an unheard-of salary in the academic world.
Here's an article, from 2003, about the new president of the UC System:
Robert C. Dynes named 18th president of the University of California
June 11, 2003
...The Regents approved a salary of $395,000 per year for the new president. That figure is 18 percent less than the $465,872 average presidential salary of the public and private universities across the nation that UC uses for salary-comparison purposes. It is consistent with the $394,640 average presidential salary of UC's public comparison institutions...