I understand what you are saying but I don't think it makes much difference. If you are rich and someone knows that and uses your wife to get to your money, they aren't going to speculate whether or not she knows something. If she does, great, tell us. If not, call your husband and have him tell us, or else...
i was thinking more like robbers split up the husband and wife and interrogate them separately. better make sure their stories are consistent. if not then someone is lying.