Lady paid the ultimate price for what her sister Nymeria did -- bit Joffrey on the arm to protect Arya (and because Joffrey is an ass). Ned had to put down Sansa's beloved direwolf proving proving our distaste for Joffrey was spot on. Nymeria now runs free.
Tyrion: Let me give you some advice bastard. Never forget what you are. The rest of the world will not. Wear it like armor, and it can never be used to hurt you. Jon: What the hell do you know about being a bastard? Tyrion: All dwarfs are bastards in their father's eyes.
Oh, my sweet summer child! What do you know about fear? Fear is for the winter, when the snows fall a hundred feet deep; fear is for the Long Night, when the sun hides for years and children are born and live and die all in darkness. That is the time for fear, my little Lord.