"They are not." Robb had been, briefly, but that hadn't exactly turned out well. Sansa had had two husbands, and while Tyrion had been nowhere near as bad as Ramsay, it hadn't been much of a marriage, either. He's not aware of many marriages that are, in fact.

"No. She had been meant to marry Brandon Stark, until..." The Mad King burned him alive. "He died."