[X] Point out your concerns that the two of them care for or at least take an interest in the well-being of the hatchlings which might spring from such a joining, and measures be taken to assuage any worries of dereliction of that duty. The reasoning is even pragmatic from your perspective--Tiamat gets the chance to tempt any Chromatic even before they have hatched, and while you have the tools, both of mind and dream, to help advise and persuade them from this path, it seems more likely to cause her lasting harm if the ones who sire future dragons spurn her at every turn in our collective life cycle. -[X] The greatest proof that they have forsworn Tiamat in more than mere word is in deed, and you can think of no greater deed than that which would convince you, not even shared battle as with Amrelath and certainly not destruction which you had to turn upon the Mother of Wyrms' own works. -[X] To make it painfully explicit, if one is not able to read between the lines about what motivates Viserys here, the bare minimum competency in "parenthood" he expects out of dragon vassals is that they teach their children Imperial Law, and the expectation that they follow it within its borders. Protections are also forfeit to those who would leave its borders only to drag in pursuit of justice after them, expecting protection from Viserys for their transgressions is unacceptable under the same clause, and even worse if it causes a conflict with an outside power. --[X] Viserys will look with favor upon those who manage to instill some actual life lessons and form lasting relationships with those they raise. Protection from harm before one has managed to grow old enough to defend oneself is also a minimum expectation.