Olympian sprinter Oscar Pistorius with his girlfriend Reeva Steenkamp at Melrose Arch in Johannesburg in Jan. 26, 2013.
Waldo Swiegers—AFP/Getty Images
March 24, 2014 8:00 AM EDT

The girlfriend of South African Paralympian Oscar Pistorius professed her fear of him just days before the double-amputee known as “Blade Runner” killed her early last year, according to court proceedings Monday.

“I’m scared of you sometimes and how u snap at me and of how you will react to me,” the model Reeva Steenkamp wrote in a WhatsApp message to Pistorius on Jan. 27, 2013, CNN reports. “You make me happy 90% of the time and I think we are amazing together but I am not some other b—h you may know trying to kill your vibe.”

The message concerned a fight the two had after an engagement party. Pistorius shot Steenkamp on Feb. 14. He’s accused of murdering her after the two had another fight, but he says he killed her accidentally when he fired at what he thought was an intruder behind a closed bathroom door. If convicted, he could face life in prison.

The message from Steenkamp to Pistorius, shown during his murder trial on Monday, offers a window into their troubled relationship.

“Today was one of my best friend’s engagements and I wanted to stay longer I was enjoying myself but it’s over now,” Steenkamp wrote. “You have picked on me incessantly since you got back from CT and I understand that you are sick but it’s nasty. Yesterday wasn’t nice for either of us but we managed to pull through and communicate well enough to show our care for each other is greater than the drama that attacked us.

“I was not flirting with anyone today,” she continued. “I feel sick that you suggested that and that you made a scene at the table and made us leave early. I’m terribly disappointed in how the day ended and how you left me. We are living in a double standard relationship where you can be mad about how I deal with stuff when you are very quick to act cold and offish when you’re unhappy. Every 5 seconds I hear how you dated another chick. You really have dated a lot of people yet you get upset if I mention ONE funny story with a long term boyfriend. I do everything to make you happy and to not say anything to rock the boat with u. You do everything to throw tantrums in front of people.”

Earlier on Monday, a woman who lived near Pistorius testified that she heard “terrified” screaming and gunshots the night Pistorius is accused of murdering Steenkamp. Annette Stipp said she heard both a man and woman scream at about 3 a.m. on the day last February when Pistorius’ girlfriend Reeva Steenkamp died, BBC reports.

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