Gillian Simpson, 46, is fighting a financial battle with her parents, Graham and Glenys, and her brother Gavin in what she claims is the latest blow in an attack on her new identity.
But lawyers acting on behalf of the family, who are counter-suing Miss Simpson, insisted: “This is not a gender issue.”
Miss Simpson, previously known as Gareth, started gender transition treatment on the NHS in 2009.
She claims her family never accepted her decision to become a woman and set out to exclude her from the family IT firm, Simtec Electronics, which operated from Mr and Mrs Simpson’s home in Hesketh Lane, Tarleton.
A close friend of Miss Simpson, who spoke to the Evening Post after the hearing at Preston County Court, claimed: “She was not allowed to wear feminine clothes or make-up and was expected to continue living as a man, regardless of the transition procedures she had been through.”
In 2011, proprietor Miss Simpson, from Tarleton, was suffering extreme stress and was given a doctor’s note to take time away from work.
But the court heard when she returned to the business premises and gave the note to her brother – an employee of the firm – he screwed it up and threw it back at her, saying: “This is what I think of your sick note.”
Mr Simpson said: “I was frustrated at fielding calls from customers.”
In 2012, Mr and Mrs Simpson banned her daughter from the property for six months after she had her ears pierced, Preston County Court was told.
Miss Simpson is now suing her family for £150,000 which she claims she lost out on after being unable to run the business when she was denied access to stock and equipment.
Her brother Gavin is counter-suing her for £19,000 of business expenses he claims were not reimbursed. However, Miss Simpson claims she did not authorise the payments and added that some items, such as Christmas decorations and a set-top TV box, were for her brother’s personal use.
Miss Simpson’s father, Graham, is suing his daughter for £99,000 in lost wages and her mother Glenys is claiming £66,000 of loans made to Simtec Electronics she claims have not been repaid.
Neither party would comment further when approached by the Evening Post.
Following a five-day hearing, Judge Philip Butler reserved judgment on the case and will make a ruling on December 22.