There's a saying, and I have no idea if there any truth to it, that you can't blackmail French CEO's and government officials this way. Their wives already know they are cheating on them and the public expects it.
I believe this is true yes, you would have a hard time getting anyone to care. You should be worried anytime you are in a union with a French man (or Lady). See Cardinal Richelieu and French alliances behind the backs of the Catholic League.
I say this as a Brit and we are the same, only we are just as perfidious (maybe worse) but hide it from are selves and others so we are easy to blackmail.
Chinese also the same. Super rich Chinese typically expected to have mistresses with the legit wife controlling access. It is abnormal for super rich Chinese not to have mistresses. Historically only one Chinese emperor did that monogamy thing, but he died young, so that probably the real reason. Western kibgs are bizarre monogamous by Chinese culture standard even today.