Isn't it
illegal to open and read other people's mail???

My mom used to open my bank-mail and she too questioned my spending. I made a HUGE fuss about her opening my mail (i.e. breaking the law), and pronounced that I do
not have to answer anything to her about this matter because of the way she found out. Kinda like when the police does an illegal search on someone's house, they can't use the evidence that's been found either
*little lawyer*