A THUG who brutally slashed his ex-lover amid claims he had cheated on her has been jailed for 10 years.

Matthew Grady, 31, attacked terrified Siobhan Stevenson after yelling at her: “I will go to jail for you. I am coming through your door. I will slit your throat.”

Siobhan ended up horrifically scarred after Grady slashed her face open.

The 23 year-old frantically wrapped a towel around the wound.

The court heard that after the incident a young girl who saw the horrific scar she said she would try and kiss it better.

Grady forced Siobhan to relive her ordeal at the High Court in Glasgow after insisting he had not tried to kill her in January this year.

But, a jury found him guilty following a two-day trial and he smiled as he was led handcuffed to the cells.

Yesterday, Grady was jailed for 10 years with two years supervision after he is released.

Passing sentence judge Lady Stacey said after reading the background reports: “The social worker has come to the conclusion, hardly surprisingly, that you are a danger to the public because of your conduct.

“I am very conscious you went to this young woman’s house with two knives and that the injuries you inflicted on her are serious.”

“It is essential you serve a long period of imprisonment because of what you have done.”

It emerged he already had a criminal past – but the details were not revealed in court. The attack occurred at Siobhan’s flat in the city’s Springburn on January 29.

The mum dumped Grady weeks earlier after she believed he had been unfaithful. He called her on the day of the assault to try and talk things over – but went on to call her a “stupid daft cow”.

Siobhan told the trial: “I told him to leave. I wanted to sort my head out as I found out he had been cheating with my ex-friend.

“He later called in a rage saying: “I am going to slash you’.

The court heard he got a taxi there – and kept the driver waiting as he went in to attack Siobhan.

She recalled: “I saw him in the mirror first. I turned around and he was running towards me with two knives in the air.”