I have 7 children of my own and two step children one lives with us after being taken away from mum for drug and alcohol abuse, she has since died of this, SD has lived with us for 5 years and is now 11, After a few days of constant arguing about staying up late, going to the park, not doing homework, after school detentions my partner yesterday told my step daughter that if I tell her to do anything, ground her? Tell her to do her homework she is to tell me to f*#k off! Why am I even bothering?