Ms Spearing said: “In the bottom paragraph, he says sorry to you, he asks you not to be mad with him and he knows that you will be but he doesn’t know what to say to you.
She added: “He says, ‘I never ever cheated on Jane and that is what is tearing me to pieces and everyone thinks I am but I’m not a cheat. But I did tell her lies and I lied so much to Jane and that is why she didn’t believe me’.”
In a pen portrait, read aloud by counsel at the coroner’s court, Mr Dymond’s brother Leslie told how Stephen joined the RNLI when he was young.
“Stephen was dedicated to the RNLI. He would never miss training,” he said.
He described how his brother did “many gruelling tasks” for the institution to rescue people when they got into trouble at sea.
“It was not an easy job… but Stephen showed up every single time,” he said. “He was so dedicated to his role.”
He said there were times when his brother would be delayed returning to shore from a rescue because the sea was too rough.
“It was a dangerous job. They were very brave men and Stephen was one of them.”
Ms Spearing told the hearing a post-mortem examination found a “potentially fatal level” of morphine in Mr Dymond’s blood.
It also found evidence of left ventricular hypertrophy in his heart.
Ms Spearing said: “The conclusion was that both left ventricular hypertrophy and morphine levels are independently capable of causing Mr Dymond’s death but in this case a combination of the two factors had led to his death.”
Ms Spearing added that the inquest had been given access to footage from a Channel 4 documentary into Mr Dymond’s death.
The inquest is scheduled to last until Sept 10.