Why the Defence Isn't Putting Forward an Expert to Testify in the Case?

The defence rested its case after a very long three months. Elizabeth holmes, when she testified, spoke fairly generally about how her relationship with sunny bawani impacted her all over and in many ways, non specifically. So i assume the defence is going to argue that the nature of the emotional, psychological and even sexual abuse,. if the jury believes that these things occurred made her more trusting of him.