Oberyn Martell has one trueborn daughter. Her mother should be lysene noblewoman and they should just pay a visit to Elia and little Aegon. But other things are waiting in King's Landing. Intriguing Rhaegar, mad Aerys and fire. Fire and blood. Basically, my version of start of Robert's rebellion. And that wouldn't be nice like "we escaped together for love". Not at all.