My pitch for a horror movie

All she wanted was her husband out of her life. Jack gave her that exactly.

A few days later, Kate noticed something in that same drawer that changed her life forever.
A diary of conspiring plans to kill her in the most horrific and distubing ways ever imagined. It appeared that William was a disturbed psychopath from the crude, almost child-like drawings he had constructed in all those days of retirement sat in his armchair. his twisted mind had fantasised about the extraction of her womb, he had an obsession with the fact that she could not produce a son and frequently expressed a repulsion for her 'poisoned wnech's insides'. He had an unhealthy obsession with cutting off her twenty digits and arranging them in size order on the mantlepiece- creatively illustrated by an untidy scrawl in blood and ink.
This was the last straw. Kate had to escape. No, if she escaped, he could follow. She had to destroy this maniac forever...