You can’t do it. It is very hard to accept that, especially if you have a family member who is actually engaged in espionage (as I remember one poster on these boards alluding to in her own case). I agree with Beryllos - look for other work. You can easily justify any number of crooked businesses with “it’s a lie for a greater good,” and indeed, it would be if you were supporting your family through dishonest gambling, for instance, or pretending to be the IRS, or an African prince, or whatever. In a lie, it is the object which is the problem, which means it is “intrinsically evil.” Certainly, the better the intention, the lesser the sin, but it remains a moral evil to lie. Sure, some espionage could be done through mental reservation alone, but to find someone sharp enough to deal with real situations in a sufficient way while “on the inside” would be difficult indeed.