The headmaster of the elite private school where Tim Paine's brother-in-law coaches says he is 'very disappointed' after learning of the lewd text messages he allegedly sent a young woman and is considering sacking him. The former Australian test captain quit on Friday after details of his inappropriate exchange with a Cricket Tasmania staffer in 2017 were revealed where he sent the woman an unsolicited' picture of his genitals and 'graphic sexual comments'. It was then reported by the Herald Sun that Paine's brother-in-law, Shannon Tubb, allegedly also sent lewd text messages, including an 'unsoliticited' picture of his genitals, to the same woman. Tubb works as the coach of the first XI cricket team at Adelaide's prestious Prince Alfred College, who count cricket legends Ian and Greg Chappell among its alumni and charges students $28,000 in school fees per year. He now faces losing his job after the principal confirmed they were reviewing his position. 'We're very disappointed, I've got to know Shannon well over the last couple of years. It was quite confronting,' headmaster Bradley Fenner said. PAC Headmaster Bradley Fenner said he became aware of the allegations on Sunday afternoon."We were advised yesterday by a journalist that certain allegations had come to light in relation to Shannon's time working for Cricket Tasmania," said Mr Fenner in a statement. — 10 News First Adelaide (@10NewsFirstAdl) November 22, 2021 Paine's brother-in-law, Shannon Tubb (pictured), allegedly also sent lewd messages to the same woman Tubb works as the coach of the first XI cricket team at Adelaide's prestious Prince Alfred College, who count cricket legends Ian and Greg Chappell among its alumni Paine announced his resignation as captain in a statement on Friday afternoon and held a press conference and 2.30pm on Friday where he tearfully apologised Tubb, who is married to Paine's sister, allegedly used social media app Snapchat to send the inappropriate messages to the staffer around the same time as the former Australian captain. His alleged behaviour was uncovered when Cricket Australia were investigating Paine's messages in mid-2018 after the woman complained to Cricket Tasmania. Tubb, who was part of the Tasmanian setup at the time, then moved to Adelaide where he played park cricket as a left arm spinner. He took on the role as the coach of the first XI at Prince Alfred in 2019, but is now facing losing his job over his alleged indiscretions. Headmaster Frenner said they learned of the alleged behaviour 'through the media' and had 'no prior warning'. 'In the light of this news, we are reviewing Shannon's position with us and will advise the school community about this in due course,' headmaster Frenner said. 'We will consider what we do and we will look through this thoroughly and look at what has occurred.' Headmaster Frenner said they learned of the alleged behaviour 'through the media' and had 'no prior warning' Tubb, who is married to Paine's sister, allegedly used social media app Snapchat to send the inappropriate messages to the staffer around the same time as the former Australian captain He said Tubb came 'highly regarded' and 'had not seen any indication of anything like this' in reference to the alleged behaviour. 'We want to take our time and make sure we get this right,' the principal said. 'We'll do it in a measured and considered fashion and we'll consider all the factors until we decide what we do [with Tubb].' The school, located in Adelaide's center, is one of the most prestigious in South Australia, with a fleet of famous graduates including the Chappell brothers, Greg Blewett and Rick Darling. Paine, who guided Australia to the Ashes in England in 2019, announced he was stepping down as captain in a tearful press conference on Friday An intermediary between the woman and Cricket Australia confirmed she reached out to them discreetly mid-2018 to first demand an apology, then wanted an apology and money to cover her legal fees - amounting to $40,000. 'I indicated that it was her intention to keep the matter private and that she was seeking an apology from Cricket Tasmania and her legal fees reimbursed,' Sean Mulcahy told The Age. 'I told her that given the impending Ashes series, the severe fallout from the South Africa incident and subsequent sacking of then captain Steve Smith, that she could possibly command a large fee for her story. Her ultimate decision was to let the matter go and move on.' Mr Mulcahy said it was never the woman's ambition for the story to go public and denied she leaked it to the media last week. 'It was always my understanding that she never wanted this matter to become public,' he said. 'She turned down the possibility of a big pay day to tell the story, yet she chose to stay quiet. I don't believe she is the source of this story now being made public.' Tim Paine (pictured with wife Bonnie) revealed coach Justin Langer begged him to stay on as captain of the Australian test team Paine said in a tell-all interview with the Herald Sun alongside wife Bonnie that he feared the story would one day become public. 'I thought the issue was dealt with, but it always popped up around a big series, or at the start of the cricket season,' he said. 'Over the last three years, there have been numerous times where media agencies have put to us that they had evidence, yet they never chose to write it. 'As to why, I'm not sure, but nobody else had chosen to write the story, but I knew it was going to come out at some point, as much as I didn't want it to.' 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