The 9th Witness by Rebecca Forster

No good deed goes unpunished: this time it's going to be brutal.

Christmas is coming and the world is joyful for everyone but Josie Bates. A devastating miscarriage, her employer’s pending retirement, and her husband’s overseas job have left her alone and adrift—until Lily Daye dies and names Josie executor of her estate. Josie has no idea who this woman is, but her will is simple and her possessions meager. In the spirit of the season, Josie accepts the job. Yet behind Lily’s seemingly modest existence lies a complex, mysterious life. When an eccentric tech mogul turns up to contest the will, the only spirit Josie is channeling is one of outrage that her life is being upended and Lily’s last wishes disrespected. Up against a high-powered, ruthless attorney, a court on a schedule, and an entitled man with more money than God, Josie is determined to protect her client’s interests or die trying.