And I'm calling for my mother as I pull the pillars down

Elia looked at her incredulously. “And you expect me to marry him and straighten this all out? Why would he listen to a thing I have to say?”

“He won’t. Your job is to make him listen, Elia. And of all the eligible maidens who will be put forth to him as potential second wives, you are cunning enough to do it.”

“A viper may strike at a lion and poison it,” Elia reasoned darkly, “But a poisoned lion can still kill the viper with a single swipe of his paw.”

“There’s my wise girl,” Mother smiled. “But perhaps the viper will not have to strike at the lion at all.”

(Elia Martell becomes the Lady of Casterly Rock due to her mother's machinations. Robarra Baratheon becomes a princess due to a demand for a bride of Targaryen blood. The seeds of rebellion are planted all the same.)