|In 130 AC, Red Keep, King's Landing
Sylvenna was the paramour of Essie, another whore and the mother of Gaemon Palehair, a pretender king during the Dance of the Dragons. Gaemon was claimed to be a bastard of King Aegon II Targaryen.
During the Moon of the Three Kings, after Rhaenyra Targaryen's escape from King's Landing, Gaemon gathered thousands of followers and issued a series of edicts, quite likely the work of Sylvenna, for some of them reflected the Rhoynish views on women inherited by the Dornish.
After the city was taken by Lord Borros Baratheon in Aegon II's name, Sylvenna was arrested alongside "King" Gaemon, Essie, and the rest of his "court". After Aegon's return to the capital, Sylvenna was hanged from the battlements of the Red Keep alongside Essie and twenty seven followers of the false king.