Huma needs a housewife and a baby sitter. He fits the bill.
Not really. I wouldn't trust him with or around a child (after all, he is a sex offender), I doubt Huma would either. I'm not even sure if it is legal for him to be near or around children. There is likely a maid or nanny involved that Huma is not talking about. Even if just to act as a chaperon.
The fact that Wiener stored Hillary's Top Secret files in a directory labeled 'Life Insurance' means that he certainly made back-ups and has them stored somewhere safe. This whole scenario, more than just being bizarre, simply does not make logical sense. That means that there is much more to this than we know.
Hillary has gotten away with murder, several times. But, in the life of every criminal, there always comes a time when fate catches up. This thing she is doing with Wiener, may be her 'bridge too far', so to speak. Wiener is a slimy, unreliable, character. Whatever deal Hillary and Huma may have struck with him, he is certainly not the kind of guy I would want to rely on to keep his end of the bargain.