Complex sentence: Del was heartbroken to discover Alice Wilson, her cousin Sam's fiancée, had been told her cancer was terminal so she and Chas gave her a hen night to remember-although Del struggled to cope with the secret.
Split into simpler sentences: Del was heartbroken to discover Alice Wilson, her cousin Sam's fiancée, had been told her cancer was terminal. So she and Chas joined forces to give her a hen night to remember-although Del struggled to cope with the secret.