how about giving her a choice - like would you like to cut up the veges for dinner or play with your little sister while I do it - do the dishes, or give her a bath, hang the washing out, or watch your sister while I do it... does that make sense. But as the others said, before she moves back in, have some ground rules well and truely established. Treat her the same way you would like to be treated, with respect, and remind her of that when it isn't happening... Oh the joys of blended families (a word I personally hate)