MORE than two thousand text messages between Ms O'Hara's iPhone, referred to as "She" and an 083 number alleged to have been used by Mr Dwyer - referred to as 'He' - are being read to the jury by prosecutor Sean Guerin SC.
Here are some of the texts read yesterday, which were sent between April and July 2011.
HE: "Would you enjoy serving by taking pain?"
SHE: "I don't know, sir"
HE: "I'm a sadist, I enjoy others pain. You should let me inflict pain on you"
HE: "What about luring someone and stabbing in your place"
SHE: "Too risky"
HE: "On my way, get naked, hood, cuff, condom, fake knife, be face down in darkened room"
SHE: "I'm not putting hood on"
HE: "Balaclava then"
HE: "I can put you to sleep"
HE: "I know you want it, 30 seconds to slip into oblivion"
SHE: "Please. I have to think and decide, Please stop"
HE: "I found a dead sheep yesterday. Might go back after dark and see how it feels to sink a knife in to it"
SHE: "I'm going to be a better slave," she texts, thanking him for his patience. "I know it's not easy sometimes"
HE: "It will be all worth it when I kill you"
SHE: "Can I ask you something?"
HE: "Ask me anything"
SHE: "Can I take down the noose and try different ways of being tied up?"
HE: "I was up flying the other day and had a peek, skeletal and ribcage where knife went in. Rest of sheep moved. "I want to do a woman next. It was a fantastic feeling, the knife going in and watching blood spurt out. So happy. X"
HE: "It's a tough choice, either you let me stab you or you help me do it to someone else"
HE: "Won't do it unless perfect plan"
SHE: "Don't know Sir, there's no such thing as a perfect plan"
HE: "You might be seeing someone die and I need you to hold it together"
SHE: "I'll do my best Sir"
HE: "If you ever want me to do something nice for me, you can let me stick (stab) you..you should always let me stab you or find me someone else to do it"
SHE: "All the time sir? Between the punches and stabs, I will never find my true love"