i'm a idiot....

crystal have to go for class tambahan at school... this is a vry embarasse thing. since she never want to study properly,my mom blame all of this on me and carmen. so i was teach her math after dinner... crystal dont even want to write a 2 and 7 properly. besides, i gave her a same excercise for 3 time tht is 1+1 until 1+9, i teached her the way to count for few times but she also didn't concentrate on it... so i was started to get mad but i keep tahan...when i give her the fourth time excercise, i wanted her to do her own as a little test.but she jz draw the paper and keep erase it.. she dont even want to do it properly so i hit her and scold her. she was cried and carmen and my dad were scold me fiercely.... i dont know wad wrong i did and why i cant get angry on it!? y she dont want to study properly and they want to blame it on me?! even i teach or dont want to teach also get scold.. why they dont teach her themself and they want to blame it on me????