So now the author is introducing a problem that was almost fixed a few chapters ago? She almost stopped being a delinquent, but just because the dumbass MC thought other guys would get interested on her, he made her go back to being a delinquent. Why should I care about her mother not liking her being a delinquent when it was so easy for her to stop being one? That would even validate their relationship because he was the reason for her to stop being a delinquent. This has been going downhill since a log time ago.
edit: Jesus Christ, that was stupid! Why during the time she thought they were dating her family situation wasn't a problem? It's like the past doesn't mean absolutely anything. if you build the world in a certain way, you have to follow it or at least remember what you established. ffs!