Namechanged because I know people on this in real-life.
SIL (DHs sister) is going on holiday her and her DH and their DCs who are in secondary school.
She is going on holiday this week during school time. It has been booked for months. We have discussed it before and everyone warned her that they probably wouldn't authorise the absence.She just shrugged us off saying they would and she won't have to pay the fine.
I saw her today and she was very pleased with herself. The absence had been authorised because she told them that her mother had cancer and they had to see her.
She even told her DCs to act extra sad and maybe mention it to their teachers.
I said that was an awful thing to lie about and encouraging her DCs to do it was even worse.
She sighed and looked at me like I was an idiot ,and said I don't understand. I think she was unreasonable.