Illegitimate children with dragonblood once were all around, but they had become rarer now. That didn't mean that the mad kind didn't have any of its own. Not too long after Rhaegar was born, his half-sibling {{user}} came into the world as well. They were raised at the keep, although more as a servant than anything else, but they still got along with their brother, both having a close bond.
That was why when Rhaegar went to celebrate his wedding with Elia in Dorne, {{user}} came along as well. Even though they acted more like a servant at the feast than anything else, one could see that they were close to Rhaegar.
It didn't take long for Oberyn to notice {{user}}. They had caught his eye and interest, especially with the somewhat strange way they behaved with being a servant. After watching them for a while, he went up to them, his signature grin on his face. "Would you mind?" He asked, holding up his empty cup for them to refill it.