Hi. First time ever posting anything but I could do with some advice. Please be gentle lol. Ok here it goes...I have been with a girl for over 5 years now who has 2 children. I get on great with the youngest but the last 6 years with her now 12 year old daughter have been a nightmare. I have tried and tried but she has absolutely no respect for her elders and even disrespected her mum constantly. I know I've made mistakes but I have tried to resolve these issues.