I would hope that noone would mock this person. Anyone doing this clearly has some issues and should not be mocked but encouraged to seek help.
When did so many people become assholes?
Where did the assumption about the loyal husband come from? (It seems to be presuming the cause and fault of the divorce, and rest is arguably built atop that.)
By "half his money", was "half the family's money" meant? (This could just be a way of phrasing, but it can also sound like prejudice towards the matter.)
We don't know anything about this person besides what facts have come up in the story, and none of us are directly engaging with them anyway.
It's much less presumptive and much more socially constructive to directly critique their behavior for being plainly misguided, so that others can learn from it, than it is to make any kind of judgment about the person themselves.
You later find out, SHOCKINGLY, that this rando is not actually Jensen Huang. You would, rightly, be a fair target of mocking for your S-tier gullibility.
This isn't "I fell for a well-designed phishing scam"-tier, or "SBF promised me 9% yields"-tier. This is a whole other level that is rightfully deserving of mockery.
The fact she wrecked her marriage in the process is just the cherry on top.