Dear Thelma: I'm in my 20s, but my 12YO brother terrorises me and my sis

Dear Thelma,

Since I first heard about Dear Thelma, I’ve contemplated reaching out since I wasn’t sure if I myself was the problem, but after seeing other submissions, and the advice and comfort given, I thought it was time I shared my story so others in a similar situation can read your advice as well.