NOOOOOOO HE DID TRY TO KILL HER!!!!! REMEMBER HE LOSES HIS PAPERBAG RIGHT BEFORE HE KILLS THIN MAN? THIS IS ESSENTIAL!!!!! This is because Mono grows up to be Thin man!!!¡!!! You see it at the very end after she let's him fall, u watch him grow into the thin man and because she betrays him he then go through tv portals into the past to find her and kill/curse her ESSENTIALly causing a revenge loop between them.