P = P
Men — in particular, powerful men — want to stick it in the hole.
Above all else, even if it means risking everything, they'll do it anyway.
https://abcnews4.com/news/nation-world/swalwell-and-fang-fan...
Diane Feinstein also had a Chinese spy for a driver for 20 years, though I'm going to assume for my own sanity that wasn't a sexual relationship.
https://www.cbsnews.com/sanfrancisco/news/details-chinese-sp...
I think this has been going on a very long time, it's just that these were politicians so I think everyone just brushed it off as "business as usual."
There are memes that super-model looking women dating nerds are almost always spies of some sort. For this spy to have any chance at gaining real information she needed to have an actual relationship with Huang - which, see above, is more than looks alone.
What is interesting is the woman appears to be extremely mid-looking.
If there is a lesson to be learned from all these extremely powerful men cheating on their wives with objectively ordinary women (e.g. Gates, Bezos, Tiger Woods) it's that the most beautiful woman in the world is worth about the same as the woman that works at McDonald's.