Teardrops of Blood. Testarosa, #15

Zid's life has always been about completing her missions, each one a success, working under Charles Anderson, the notorious son of Nathaniel Anderson, who allegedly employs killers for hire. Trained by Nathaniel to be an assassin, Zid struggled to believe she could be the empire's successor, doubting her worth in a world that sees love as a weakness. She married FBI agent Neil O'Hara, a man dedicated to solving cold cases and hunting the elusive assassin responsible for recent murders and his father's killer.
When Zid discovers she's pregnant, she begins planning her escape from the Order of Sorties-and Charles's grasp. Reinventing herself as Nixia, she starts a new life as an antique shop owner with her daughter Niana, seeking refuge from her past. Alongside her childhood friend Tensa, her half-sister Oremi, and her lingering grudge against her biological father, Zid's world is turned upside down when her past collides with her present.
With the Order hunting her and her love life at risk, she must confront whether she can escape the life she left behind or if her past will destroy her forever.