sisters!!

how do u deal with ur sister when u do some problem and she interfere in the situation and tell ur parents ur really mistaken and when u talk to her she says ur totally wrong and should be punished i think all guys or at least most hate interferance of their sisters in personal problems
sometimes i wanna shoot or through her from the window hehehe
im talking to guys mainly...in the range 18-22 years. girls also reply..... defend urself
thnx
waiting for ur comments and replies

The fist time my sister found that I drank, as my mom was walking up the stairs she loudly said "does MOM know" forcing me to tell her. I think older sisters have some sort of contract they have to sign that forces them to butt in where their not wanted