The man , who said he had once been engaged to her , first knifed Kotlarska 's husband in the leg , then stabbed her three times in the chest when she tried to intervene during the incident on Tuesday .
<response> The man , who said he had once been engaged to her , first knifed <person>Kotlarska</person> 's husband in the leg , then stabbed her three times in the chest when she tried to intervene during the incident on Tuesday . </response>