Some of those messages, written on scraps of paper, had been torn up and their meaning was difficult to decipher, translator Sukhdev Bains told the court.
But others - using Hindi, Punjabi and English language - were intact and were presented to the jury today.
Many of the notes discuss their love and appear to show one lamenting the state of their life since the affair had been discovered.
"Please do something love. Love you so much. I miss your body smell and your nice hug," one is signed off.
Another note repeats the word "kill".
"How would you kill and then after how will we come (back)? It is not sure that there would not be cameras. What do you have that we can use to kill? There is lot of police around there. Please explain to me in detail so that I can also think about please."
Another alleged conversation was translated as: "Lali (nickname) if everything goes well today do not spare him, he made me suffer a lot really. I do not want to live with him. Love you."
In opening, Crown prosecutor Natalie Walker accepted none of the messages were dated but said they provided an insight into the defendants' relationship in the three weeks before the alleged murder.
Kaur allegedly told Gurjinder Singh he was "the first priority" in her life and asks whether he would accept her son as his own.
"I promise you I would love your family as much as my own mum/dad ... You are my first and last love in my life. Love you so much," she allegedly wrote.
It is the Crown case that on the night of the killing, the victim picked up his wife from work and they pulled over on Norman Spencer Drive on the way home.
Gurjinder Singh allegedly parked behind them shortly afterwards and grainy CCTV showed a vehicle leave minutes later.
"I feel that you have to follow our car. Please Guri I want to live with you. Please Lali," one note said.
The Crown is expected to finish calling evidence by the end of the week before defence lawyers have the chance to introduce their own witnesses.
THE NOTE
You are saying that when you reach there. How would you kill and then after how will we come (back). It is not sure that there would not be cameras. What do you have that we can use to kill? There is lot of police around there. Please explain to me in detail so that I can also think about please. Try to understand.