Lone Star Christmas Mission by Delores Fossen

The festive lights of Christmas can’t erase the shadows of the past. Former Navy SEAL and now an elite security specialist at Maverick Ops, Cash Whitaker lives with the haunting memory of failing to save both of the Morgan twins from a vicious killer. Two decades ago, he managed to rescue Kayla, his then girlfriend, but her sister, Kira, died at the hands of the man trying to abduct them.
Kayla Morgan has spent years trying to rebuild her life, but the ghost of her sister’s tragic death lingers and has kept Cash and her apart since neither of them want to deal with the horrific flashbacks. Now, just as she’s beginning to find peace, the past comes roaring back. The killer’s nephew has surfaced, determined to finish what his uncle started. As a campaign of terror begins, hostages in Santa suits are murdered to draw Kayla and Cash into a deadly game.
Cash and Kayla must confront their deepest fears and darkest memories. With a new killer on the loose, their only hope lies in facing the past and outwitting the present danger. Will the magic of Christmas bring them together again, or will the shadows of the past claim them once more?