article_snippet: Amer, 20, left the family home in Saltdean, near Brighton, in October 2013 and joined the Al Nusra Front, and two months later his brothers joined his in Syria.
article_snippet: Amer was the first one to leave in October 2013,' Mrs Abulsayen said. '
article_snippet: Amer said to Mrs Abulsayen, "Mummy, there is a community that has English people who want to help refugees.
article_snippet: " 'Amer said to Amer, "Mummy, I feel guilty.
article_snippet: This is the best opportunity for Amer.
article_snippet: " 'Amer is very calm, like her sons, and Amer gave me a promise Amer would be back.
article_snippet: Amer said it was just a trip to help refugees. '
article_snippet: 'If I die, you will be upset if I am martyred', Amer said to Amer.
article_snippet: In a film shot last year, Amer insisted Amer would not return home, saying: 'My work here is not done.
article_snippet: If he did return to Britain, Amer could face legal action, because the Al Nusra Front is classified as a banned terrorist organisation by the Government.
highlights_snippet: Pleads for Amer to return to her sons home in Sussex after brothers' deaths .