What do we learn about Areena Mansfield in the novel, Witness in Death?

Over the course of the novel we learn that the female lead in "Witness for the Prosecution," Areena Mansfield, planned Draco's murder. Years earlier Draco had seduced Mansfield, then known by the name Anja Purvell. After becoming pregnant the young actress placed the baby up for adoption. Now that daughter is an actress as well, Draco is intrigued when Mansfield tells him to stay away from her. Instead, Draco seduces his own child, and Mansfield kills him in retaliation.