The mother of Jihadi Jack tried to offer him a £5,000 “bribe” to encourage him to leave Syria, a court heard.Sally Lane, 56, told of the “tightrope” she and her husband John Letts, 58, were forced to tread as they tried to keep in contact with Jack Letts while he was in Isis-held Raqqa.Mrs Lane said she thought Letts had travelled to Jordan and Kuwait for study and tourism until he called her on September 2, 2014, and said: “‘Mum, I’m in Syria.”Giving evidence yesterday, she told the Old Bailey: “I was horrified. I screamed at him, ‘How could you be so stupid? You will get killed. You will get beheaded’.”Mrs Lane said the following month she attempted to use a £5,000 inheritance from her son’s grandfather “as a bribe” to encourage him and his new wife Asmaa to get “somewhere safe”. When she saw that Letts had appeared to threaten to behead an old school friend on Facebook, she said she felt “absolutely sick”.”It was so out of character. He had never said anything violent before. I just thought it didn’t sound like him,” she added.Organic tenant farmer John Letts, 58, and former fundraising officer Lane, 56, deny three charges of funding terrorism. The couple are accused of sending or trying to send sums totalling £1,723 to their son, even though they had every reason to believe he had joined Islamic State. Jack LettsCredit:Central News Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.