The Queen She Crowned

Marisol Vega was Earth's junior envoy until she was accidentally crowned. Now she's stand-in queen of the Aurelian station, and by law she must take three consorts from the three fighting houses or hand the whole station to the Hegemony parked outside its range. Reza wants to conquer Earth. Kael wants to buy it. Tiro already sold some of it. She has eighteen days to rule them, bed them, and beat the ritual at its own game. When the Hegemony moves in, three enemies become the only people standing between Marisol and a war she can't win alone. A queen needs consorts. It doesn't say she has to choose one.