The divorce and remarriage of parents can be very hard for children. Especially if the divorce involved nasty things like cheating. Also, it doesn’t help when the new partner of a parent isn’t a good person.
Like in this story: a marriage fell apart because of cheating, and the dad married his mistress, which was a very sad day for the rest of the family. And what’s even worse is that the stepmother basically tried to abuse her way into the hearts of his children. But they didn’t give in and sought revenge on her in a creative and musical way.
More info: Reddit