Diane Stewart's sister, Wendy Bellamy-Lee, told the jury she had asked the coroner for more details about the death as she was suspicious of her brother-in-law.
When she told Stewart what she had done he became angry, she told the jury.
'He was really really cross with me. He was so cross with me. I felt really bad that I had done that and had to tell him.
'I thought I had upset him because he was so cross with me. 'Ian said 'you don't need to know… that I had no right to do it, that it was not my right - he thought it was not my business.'
Mrs Bellamy-Lee said after confronting Stewart he had been blunt with her.
'I think he put the phone down on me. He said it was inexcusable what I had done and he just put the phone down.
'I had my own suspicions, I needed to try to calm them and get them out of the way but it did not, it made them greater.' She told the court her sister had tried to raise some concerns about Stewart during a family swimming trip during the 1990's.
'She was uncomfortable about something, like Ian expected more of her.
'I did not feel happy about what she was trying to tell me… we did not get back to where the conversation was..."
Wendy always knew. You could easily see that from her posts remembering her sister. I hope she finally gets justice.
Man who killed children's author Helen Bailey on trial for wife's murder | Daily Mail Online