Why might that be?

为什么呢
Wars cost money.

战争是需要花钱的
Many people would pay a great deal for you.

很多人都愿意为你出大价钱
We both know who would pay the most.

我们都知道谁会出价最高
Or make you pay the most if he found out you had captured me

或者谁发现是你把我抓回北方受死
and sent me back up north for a summary execution.

会让你付出的代价最高
You're right.

没错
Perhaps the safest thing to

或许最稳妥的办法
do is to kill you both and burn your bodies.

就是把你们俩灭口焚尸
It would be,

的确如此
if you honestly believed my father would never find out about it.

只要你相信我父亲永远不会发现
King Robb is keeping your father quite busy.

罗柏国王已经让你父亲忙得焦头烂额了