Polly Murphy, of Hornsey Lane, assaulted her 47-year-old partner James Self in a hotel room in Hartley Brook, Clacton, on November 8, 2023.
Mr Self, who is also from London, sustained several injuries and died in hospital over a month later on December 21 that year.
Murphy was initially charged with causing grievous bodily harm with intent but was charged with murder following the death.
She has remained remanded in custody since then, and throughout her trial at Chelmsford Crown Court which began in November 2025.
After four weeks, Murphy was found guilty of Mr Self’s murder and will be sentenced at the same court on February 4.
In a statement, Mr Self’s mum Ashe said: “On 21 December 2023 my beloved gentle son was in my arms when the dreaded heart monitor signalled the end of his six-week struggle for life.
“This was the beginning of what is now two years of living with the pain and grief of losing someone we shouldn’t be living without.
“All the dreadful weeks of James’s struggle with many difficult and painful procedures he endured without complaint.
“Like so many men James was embarrassed by the control and violence being inflicted on him. Sadly, he would never come forward to seek help.”
She added that her son “always believed in the good in people”.
The mum continued: “James went from being a sociable, happy person to a sad, uncertain and withdrawn one. His friends noticed the change in him.
“I do not know how we as a family have got through these past two years. It has changed all of us. The depth of sadness for not only his death, but the brutality inflicted on a caring and frankly vulnerable man. He had such a lot to live for.
“James is in my thoughts every day and will be for the rest of my life. I will never hear his voice again or hear him laugh. Never share in our family events.
“His kindness may have cost him his life.”
Detective Anthony Kopf of the Essex and Kent Serious Crime Directorate, who was the officer in this case, said: “There were delays in the proceedings due to multiple changes in legal representation during the case.
“These changes did not affect the integrity of the investigation or the strength of the evidence presented by our team, nor the work of prosecutors Barnaby Shaw and Samantha Wright, supported by the Crown Prosecution Service.
“Murphy now faces a life sentence for her crimes.”
