We open with Tracey deciding she will stay with Dean because to break up with him would be to let him off too easily and literally nothing about her decision makes sense.
Tracey is determined to make Dean feel the consequences of his actions, which so far include remaining with a girlfriend he has a) broken up with and b) cheated on, and where are the consequences tho.
It sounds more like the problematic reinforcement of unacceptable behaviour. But okay.
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