NUTS by Tom Topor at The Studio Players

When strong-willed, high-class call girl Claudia Draper is indicted for manslaughter in the first degree after killing a client in self-defense, her mother Rose and stepfather Arthur attempt to have her declared mentally incompetent, which would prevent a trial and cause Claudia to be institutionalized. Public defender Aaron Levinsky is assigned to her case, but Claudia is angry and distrustful of everybody, and she resists his help, disrupting both her examinations by psychiatrist Herbert Rosenthal and her court hearings. As findings progress, new insights into Claudia's entire life experience, including sexual abuse by her stepfather, begin to surface.