Her Disclosure by Clara Beckett (The Chambers Series)

Frances Laine KC has spent fifteen years staying invisible, but everything shifts when Dr Tess Bancroft is appointed to her case. Tess notices details no one else sees, including the cracks in Frances’s control. They are supposed to stay professional while fighting to reunite two children with their mother, yet neither can hold the line.

As their connection deepens behind closed doors, discovery would destroy the case and keep the children from going home. Frances learns what it costs to be seen, and Tess learns what happens when she stops watching and starts wanting.