Lone Star Secrets by Delores Fossen

As teenagers, Maverick Ops security specialist, Angel DeLuca, and Mia Sawyer ended up in the same foster home where they became close friends and eventually lovers. After one of the other male residents tried to assault Mia, he disappeared without a trace. Now, twenty years later, Angel and Mia have drifted apart, but when the body of Mia’s attacker is found, everyone in the foster home, including Angel and Mia, are suspects.
And targets.
Someone clearly doesn’t want the identity of the killer to come out and wants the secrets of that horrific night to stay buried. As the attacks and the danger escalate, Angel and Mia reunite, stirring up the old attraction between them—along with Angel’s need to keep her safe. Angel and Mia must confront the demons of their past and stand strong together, even as their world unravels around them.