Dorian Hightower's second wife

"When the Andals invaded Westeros, Lord Dorian Hightower told his wife of twenty years that wars are bad for trade. And to make his point, traded her for a young Andal princess."

- Qyburn Lady Hightower was an Andal princess who married Dorian Hightower to make an Andal-First Men alliance during the Andal Invasion.

Biography
When the Andals invaded Westeros, Dorian told his 20-year-old wife that wars have a negative impact on trade, and abandoned her to marry a young Andal princess.

Reference

 * Oldtown (Histories & Lore)