Man of Honour
Surprised a lot of people think settlements like this is fair game.
Regardless of who did what, though if it was the other way around? He'd probably drop her in a moments notice without so much as a thanks.
Just because it's law doesn't make it right, but most people seem to think it is, another sad state of society, rules made by us don't always make sense. Also you can never, ever, ever be certain the other party hadn't ever done the same. But hey, nobody cares right.
I find myself curious, why do settlements like this not make sense? The marriage contract is broken unilaterally through no fault of the other partner even if they've been (in)directly contributing to the success of their wealthier spouse - why shouldn't they get their fair share?
You're right, we don't know if she did or did not have extra-marital affairs but it seems a trifle remiss of Mr Bryant's legal team not to investigate the matter and use it were such affairs in evidence since that would probably have helped reduce his liability.
But yeah dawg, prenups.
Might have helped him there, not so much in the UK as until very recently they were simply ignored, even now they're just persuasive in certain cases.