@derpdederp She's trying to get him to miss the train, as in 10 minutes when he thinks he can still make it, it'll be much too late requiring him to stay at her place overnight. She's probably a combination of jealous and upset that despite confessing to her he seems to be doting on another girl, meanwhile she wants to get closer to him. If she had told him the truth he would have left immediately and proceeded to spend time with Iino and that'd be it. Least that's my take, but it's clear she doesn't want him to make the train.