By Jorge Calvillo (staff@latinospost.com) | First Posted: Apr 03, 2014 01:35 AM EDT

On Monday, March 31, the trial against a woman accused of murdering her boyfriend by stabbing him in the face with her stilettos at least 25 time last June began in Houston, local media reported.

According to a report by The Associated Press, quoted by the Miami Herald, Ana Trujillo, a 45-year-old woman said she was defending herself from her boyfriend, Alf Stefan Andersson, 59, a professor and researcher of the University of Houston, during a violent fight in June, 2013.

Trujillo, born in Mexico, affirmed that she defended herself with the only weapon she had, her stilettos, when the fight she had with Andersson, an American citizen born in Sweden, got out of hand.

However, the case's prosecutor, Sarah Mickelson, told the jury that Trujillo had a history of violence and assured that Andersson was a calm person, statements which contradict Trujillo's defense, according to the Miami Herald.

According to ABC, on June 9, 2013, Trujillo made a call to 911 shortly before 4 a.m. and the officers who answered the call said that when they arrived at Andersson's expensive apartment, the woman opened the door and she was covered in blood.

The fight between the couple had started earlier that night at a night club, when a man offered to buy Trujillo a drink. After arguing in the club, the couple returned to the apartment and argued again.

Trujillo, a mother of two, argues that she only tried to stop Andersson who tried to strangle her, according to court records ABC News had access to.

"Stefan Andersson grabbed her, started a fight and then got on top of her. She couldn't breathe," said Trujillo's lawyer, Jack Carroll, who insists that his client is innocent.

"I'm going to have a very limited time to try to convince the jury that despite Ana having problems in the past, she's a kind-hearted person," said Carroll, in the opening statements of the trial.

It's expected that Trujillo's trial will last a week.