I know I'm going to get slaughtered for being a crap step mum, but I need somewhere to vent. I have my own dd 14 ds 11 and 2 sd 11 and 13. Now they all have their issues due to their ages, all can be stroppy at different times of course they are their teenages but I just can't bond with the youngest sd. She's known me for 5 years now and hardly speaks to me, she lies, she hits and tells my ds he is stupid daily, she's moaned I don't do her washing in time, I don't clean the house, I do nothing her dad does it all. I was really upset by this, I do my best, run my own business clean cook etc for 6 of us (they are with us 50% of the time). I told her dad and he did speak to her and made her apologise, I said thank u and let's forget it now, but nothing's changed. I treat her to new clothes, lunches, dinners out, days out, treats in holidays yet she still struggles to even speak to me. I feel like she hates me. I'm feeling resentful towards her though, she never does anything I ask of her never eats anything I cook for her, the only time she does speak to me is when she wants money for something. I don't feel like this towards any of the others as although they have issues and can be selfish, they give back a bit too. I promise I don't show it to her I just plod on and let dp do any disciplining. What am I doing wrong?