Fiona Donnison, 45, suffocated Harry, three, and Elise, two, when she wrongly suspected her husband Paul had started an affair with an old schoolfriend.
She then armed herself with two kitchen knives in an attempt to kill Paul, 48, and blame him for the death of their children, it was alleged.
But Mr Donnison did not return to the family home that night. The next day she handed herself in to police saying she had killed her children.
A jury at Lewes Crown Court was told that the city banker was a controlling narcissist who wanted to make Mr Donnison’s life ‘as miserable as possible’ to the extent that she ‘used her children as the ultimate and final weapon’.
The couple had separated five months earlier when Donnison had abruptly left the £450,000 family home in Heathfield, east Sussex, taking the children with her.
She had just been made redundant from her high-flying job and was convinced that Mr Donnison was seeing someone else. Read More