Star King and the sequel Star Prince by Susan Grant. These are futuristic romance science fiction novels.
In Star King Time and space pause, bringing two people from vastly different worlds together for only moments. Air Force Lieutenant Jasmine Boswell believes she's been shot down over the Saudi Arabian Desert. Prince Romlijhian B'Kah has just witnessed his brother's plane exploding when a vision of what he believes to be an angel saves his life. For a moment, soul mates meet and recognize the profound implications, only to be wrenched away. Later each believes that their meeting was only a hallucination. Nine years later, an alien nation contacts earth to establish trade relations. A glimpse of one of the aliens on television brings instant recognition to Jas. She immediately arranges a six-month absence and smuggles onto the airbase where Rom's star craft is about to launch. Jas is divorced, her life missing something, and she longs to seek answers in the stars. Rom has been disowned from the royal family and is making his living as minor smuggler. As their worlds collide, Jas and Rom struggle with their painful pasts, their growing love and an encroaching evil that threatens to destroy the galaxy.
In Star Prince, Princess Tee'ah Dar was sick of enduring life in isolation as Vash Nadah tradition demanded. In a desperate bid for freedom, Tee'ah stole a starspeeder to begin a new life doing what she loved most, flying! Ian Hamilton, an Earth dweller who was the heir to the Trade Federation and crown prince of the Vash empire, was deep undercover. He posed as Ian Stone, a trader of black market items. He was determined to bring the human people of Earth, the Vash people of Sienna, and all the people in the Federation together in peace! However, freak accidents and bad luck kept getting in the way. When his pilot died, Ian's crew was stranded on an awful world called Donavan's Blunder. Ian's critical mission would have failed right there, had a spunky pilot, Tee, not happened to appear. But neither Ian nor Tee told the other who they really were.