Mr Cheema lost sight and died soon after having the curry
A man who died after eating a poisoned curry may have cheated on his fiancee with his alleged killer, a court heard.
Text messages from Lakhvinder Cheema days before his death show he may have been cheating on Gurjeet Choough with Lakhvir Kaur Singh, 45, the jury heard.
Mr Cheema, 32, known as Lucky, died and Miss Choough, 22, fell seriously ill after eating the curry at their home in Feltham, west London, in January 2008.
Ms Singh, his lover for 16 years, denies murder and attempted murder.
Ms Singh placed deadly Indian aconite, disguised with herbs, into a curry meal in the fridge at Mr Cheema's home, the prosecution alleged.
Mr Cheema told his fiancee that he had ended his secret affair three years ago, but text messages from him to Ms Singh days before his death suggest the relationship had continued.
Ms Singh and Mr Cheema had been lovers for 16 years
Sir Desmond de Silva, QC, defending Ms Singh, asked Miss Choough if she was "deeply hurt" about the revelation, to which she replied "yes".
He said: "It looks as if Mr Lucky Cheema was cheating behind your back, wasn't he?"
Miss Choough replied: "Having read these messages, it would seem so."
The pair were discussing wedding plans when Mr Cheema lost his sight and died an hour after going to the hospital following the meal.
Ms Singh, a married mother-of-three from Southall, could not accept rejection when Mr Cheema became engaged two months before his death, the court heard.
She also denies poisoning Mr Cheema the month before. He spent a week in hospital after the earlier alleged incident.
The case continues.