Just be a nice big brother and forgive her....
.... Then when you have her trust, you play a game with her. You make a treasure map. Walk 10 paces from the back fence etc. then get her to dig where X marks teh spot. Only instead of treasure, you have buried a poo. It is teh poo of doom. She will dig and dig, but by the time she has realised there is no treasure, her hands are covered in poo.
She will have the poo-hands of doom!!!
.... but seriously though. She started a new game on tetris. Did she even know you had an important game in progress? I don't think she was doing to be mean or anything, do you? She's a little sister dude, she wouldn't be doing a very good job if she wasn't causing some kind of trouble for you. Just give her a down to back heavy kick, then spam the hadokens.
.... Then when you have her trust, you play a game with her. You make a treasure map. Walk 10 paces from the back fence etc. then get her to dig where X marks teh spot. Only instead of treasure, you have buried a poo. It is teh poo of doom. She will dig and dig, but by the time she has realised there is no treasure, her hands are covered in poo.
She will have the poo-hands of doom!!!
.... but seriously though. She started a new game on tetris. Did she even know you had an important game in progress? I don't think she was doing to be mean or anything, do you? She's a little sister dude, she wouldn't be doing a very good job if she wasn't causing some kind of trouble for you. Just give her a down to back heavy kick, then spam the hadokens.