Teesside Crown Court was told how the victim would have died had the blade entered his body millimetres either side.
Buckley, 29, was jailed for three years for her part in the attack on March 23 this year, while friend Sophie Borrell, 17, was jailed for six months. The pair came across Mr Tawes, 20, in Middlesbrough town centre and invited him back to their home in Emerald Street for a drink.
Shaun Dodds, prosecuting, said each of them tried to instigate sex with him.
Borrell punched him in the back of the head and tried to choke him while Buckley then went through Mr Tawes’ pockets for his mobile phones and wallet.
The victim was punched again by Buckley, and when he got up and walked towards the doors asking for his belongings back, she plunged the knife into him.
Mr Dodds said: 'Buckley wiped the blade on a cloth and went to the bathroom to wash it.
'She was shown the wound and said: “Oh my God” and to her credit, took a cloth to press on the wound.' But their concern for him appears to have turned to themselves because they both told him he was going nowhere.
'He said he needed to go to hospital. 'Joanne Buckley said: “I know what, we will all go to the police station and say he tried to molest us, and that’s why I stabbed him.”
Mr Tawes managed to escape and called police.
Nigel Soppitt, for Buckley, said: “It was another day in her chaotic life - a variety of drugs and a bottle of vodka each day was completely the norm. The pitiful aspect of the case is that was everyday for her.
'She would obtain money from wherever and spend it on drink and drugs and be in a state of oblivion.'
Borrell’s barrister, Joanne Kidd, said she had suffered difficulties that led to her mixing with older and more sophisticated people and getting into trouble