SALEM – Kathie DeFelice, charged with fatally stabbing her boyfriend in 2006, told jurors the stabbing “just happened,” as she testified Monday about the seven-year relationship that involved verbal and physical abuse by her boyfriend.DeFelice, 48, who last lived in an apartment at 27 Union St., Lynn, went on trial last week for the first-degree murder of 55-year-old William H. Olsen, II, of Danvers, on or about Oct. 31, 2006 in which he received a single fatal stab wound to the heart.She took the stand Monday in Salem Superior Court, describing the fatal incident as well as describing how many times she was abused by Olsen during their relationship, trying to convince the jury she acted in self-defense and was suffering from battered women’s syndrome when the stabbing occurred.She admitted inviting him over that night to her Union Street apartment, despite a 209-A court order restraining him from seeing her. She said she was lonely and wanted to “chat.”She had already finished a bottle of wine with her new boyfriend when Olsen arrived. She said Olsen was intoxicated, slurring his words. The conversation was friendly, she said.He had five more beers and she had two when she asked him to stop contacting her family.He became “mean” she said.”He said he was going to kill me,” she said. She testified that he looked at her, and she knew the look, like a light switch, he would change personalities. She said he put his arm around her throat and squeezed.”I was terrified,” she said. “I was thinking my mother was going to have a funeral.”I grabbed a knife on the table,” which she said her new boyfriend had brought to open the wine. She said she grabbed it and stabbed him.”It just happened,” she said, adding she then ran out of the apartment. “I guess I was in shock.”DeFelice testified that she did not mean to kill Olsen and that she did not know his wound was fatal when she fled.She eventually made her way to the Stop & Shop in Vinnin Square in Swampscott where she used a pay phone and called 911.Police went back to her apartment and found Olsen. He had been dead for hours, police said, with the body showing signs of rigor mortis.DeFelice, a former legal secretary, said she grew up in Peabody, worked for a Lynn attorney for 17 years and helped run a newspaper the attorney owned.She met Olsen in April 1998 through a mutual friend, lost her job and then the apartment she and her daughter shared on Broadway in Salem.After moving out of her Salem apartment, she moved in with Olsen at Folly Hill apartments in Beverly and then to North Putnam Street in Danvers, where Olsen, a self-employed house painter, lived at the time of his death.DeFelice told jurors about the verbal abuse, name calling and how Olsen would threaten to kill her. Later, he would say things would get better and reconcile their relationship, she told jurors.At times he would spit on her, call her names and say she couldn’t do anything, left love letters from former girlfriends in plain view, made her listen to music he was fond of with another girl and made her walk behind him when they went out, she said. She said he would laugh when she confronted him on the issues in their relationship.At one point she became pregnant and he made her abort the fetus.Then on New Year’s Eve 1999, he broke her arm after throwing her on a coffee table, she said. She also lost a tooth when Olson punched her during another incident.Her defense lawyer Edward Hayden told the jury that Olsen abused DeFelice in order to control her and that battered women lack self-respect and emotionally depend on their abuser, which causes people to do things that are not in their best interest.There were five 209-A court restraining orders filed by DeFelice to keep Olsen away from her during their seven-year relationship.During those times, she lived in shelters, her car, with friends and family, but always went back to Olsen.Each time police were called to their home because of physical abuse, DeFelice never f