The Rise and Fall of Infamous Serial Killer Mary Ann Cotton 

Upon becoming pregnant, Mary Ann experienced the loss of her son from her marriage to Frederick. She successfully persuaded Nattrass to alter his will during this time, ensuring she was named a beneficiary. This strategic move aimed to secure financial coverage through his life insurance in the event of his death.

Nattrass, oblivious to Mary Ann carrying another man’s child, succumbed unexpectedly to a sudden gastric fever. His untimely demise led to a significant portion of his estate being bequeathed to Mary Ann. Additionally, it granted her access to claim his life insurance benefits, thus further securing her financial future.