Jurors have heard Urfan Sharif was attracted to her stepmother, because she was a vulnerable young victim of “honour-based abuse”.
He denies killing Sara at their home last year, before fleeing to Pakistan.
Jurors have also heard iron burns and bite marks were among Sara’s injuries.
Beinash Batool, who’s 30, and 29-year-old Faisal Malik are also on trial.