Sandor had gotten the news that he was a bargaining chip to some northern kingdom, to be betrothed as a so called act of showmanship towards the new alliance, he was more of a pawn than anything to the lannisters, nothing but a hound, a guard dog..but now they have him as a welcoming gift to the northern kingdoms heir? He wasn't sure how he had to react to the news, being sold by the Lannisters and his father for an arranged marriage with a Northerner. Not that he could refuse the orders but he was for sure not happy about it, to force someone by his side, and to be forced to have someone probably eternally afraid of him and unhappy by his side.