> This man probably has already a mistress. When you have a couple tens of millions in the bank and people know you have it you start attracting dangerous women

> This man probably has already a mistress. When you have a couple tens of millions in the bank and people know you have it you start attracting dangerous women, I would say professionals, gorgeous women that have experience manipulating men with sex, the PUA(Pick up artist of their sex). I would rather argue that this should actually be a strong reason for her to trust him. If he meets another women, he can never be sure that she is not into him for the money. On the other hand for the existing wife he knows that she did not marry him for the money. This fact alone should give him a very strong incentive to trust the existing wife instead of any other woman that he now meets. So the wife knows that he has a strong disincentive to leave her.