I never thought I'd be a fan of alien romance, but Aria has made a fan out of me. This is an alien/human romance where the human is a slave to an affluent alien family of another species. When all the noble aliens are invited to a royal ball where the prince will choose his mate, she's dragged along with her owner.
The Playboy Alien Prince: A Steamy Sci-Fi Alien Romance (Royal Alien Mates Book 1)
This book was so good. The characters had instant chemistry and the descriptions were amazing. Instead of coming off as crass at times, it was just super sexy without the cringe. The girl main character loves her job, and she doesn't want to risk it over a hot prince. He has a responsibility to marry and have heirs, but he's distracted from the mission because of his feelings for her.