"You know, if you truly want this, I will do it. I can find some believable proof and announce to the world my parentage, despite the problems it can cause in the long run. But as a king, I cannot help but look upon this from a place of logic. Our potential union has consequences, and should you desire it to happen, you should think about them. The Northern Lords won't like it very much, as some of them are probably aiming for marriage with either me or you right now. It is way simpler and safer for me to be the bastard son of Eddard Stark and an unknown and beautiful dragonseed. That way my descendants would not have any imagined blood claim to the Seven Kingdoms and would not enter or be pulled into foolish wars south of the Neck based on it. Nor would I have the blood of madmen. And would you and I be referred to as brother and sister fuckers and our children would be called spawns or abominations? Despite what the truth is, we were raised as siblings, and people would still consider it perverse. Some would probably even go so far as to say that I am fabricating a story just to fuck and marry my sister. While nobody in Winterfell will speak out against it, the rest of the lords and ladies will, even if it is not to our faces. I can ignore the rumours, I care little about the opinions of others. But can you take it if most of the nobility mutters and insults you and your children behind your back?"