Bella's Three Bodyguards (Multiple Partner Erotic Romance, Profortuna Series) by Suzanne Graham
Due to Bella's exceptional intellectual capabilities in mathematics, the Council of Profortuna matched her with the three highest scoring IQs in her Quadrant to perpetuate her genes. The men were incredibly smart and equally dull. Bella had datapad apps that gave her more pleasure. In five years, she hadn't developed anything more than a general fondness for the men she privately referred to as Dweeb One, Two and Three.
When the Open Air Society attacks the scientific center of First Quadrant, killing Bella’s mates, three members of Fourth Quadrant’s special security forces take Bella into protective custody. As her bodyguards work a rotating schedule, she explores her physical attraction to each of them. Defying the Council’s ban against unauthorized relationships isn’t Bella’s only act of disobedience. When she learns the motives behind the Open Air Society’s rebellion, she resolves to join the freedom movement, with or without her three bodyguards.