I've given it an edit and now I feel as though it's presentable.
The theme is denial.
“I killed my wife.
I didn’t do it with one of those manly, violent methods. No, I poisoned her.
She didn’t eat or drink anything. It was subtle, something no autopsy could find.
I poisoned her mind, I littered her with compliments to build up her self esteem before I destroyed it, killing her.”
The doctor looked at Robert Jenkins over her glasses, she was alarmed by the glee with which he confessed to causing a woman’s suicide, but was more concerned by the fact he’d never been married.
He just smiled at her affectionately, “but we’ll be different, darling.”