I've very recently moved in with my partner, (2 months ago) we both have children from previous relationships, my daughter is 4 and he has two kids, a daughter who's 7 and a son who's 10. I'm struggling with keeping things fair and knowing when to and when not to react to fallings out/disagreements. My daughter will often 'tell on' my partners daughter, sometimes this is for a good reason - she has deliberately physically hurt her but often it is because she has brushed past her and my daughter turns it in to a drama! The older brother is starting to feel resentful because he feels my daughter is always telling on his sister. I don't know how to handle this! I feel I have to intervene as my stepdaughter has deliberately hurt her in the past and I don't want my daughter to feel she can't tell me when bad things happen - but sometimes it is an exaggeration. How and when should I react??