My partner has always had his sons 50/50 since splitting with their mother, recently the mother has moved a few hours away for a new relationship and taken the boys (age 7 and 13) with her meaning we’ve gone from having them half the time to only every other weekend and most of the time through the school holidays, this has been a horrible thing for us to go through (especially for my partner) my partner and I have our own daughter (age 2) and since the move their has been a huge amount of jealousy from my stepson (the 7yr old) towards our daughter, we’re very aware it comes down to the fact that he’s upset that he doesn’t get to see his dad as much now and is jealous that she lives with him all the time. We’ve done a lot to try and improve this, including doing fun family days out, him have days or activities alone with my partner and nothing has seemed to help, infact it’s now got to the point where he’s very mean and cruel to our daughter (he shouts at her, takes things away from her, there’s been a few incidents where he’s pushed her or pulled things out of her hands so hard that it’s pulled her over, he mimics her crying to try and make her more upset and then has a go at her for being upset, he snatches things off her and then when she tries to take it back tells my partner she’s trying to take it off him when he was playing with it, he tries to get her in trouble after encouraging her to do things she shouldn’t be doing) and we’re completely at a lose of what to do, my partners sat down with him and explained that it’s not her fault that he’s moved and that she misses him and loves him like we all do and like he does us, we’ve told him off when needs be but it’s just never ending. We’ve always been a united front and agree that the behaviour is disgraceful, we’ve both witnessed all of the things I’ve said about together and separately. i will never ask my partner to choose between my daughter or his sons but i will make the choice to take my daughter away from it as it’s not the environment i want her to spend early years in (or the foreseeable future) it’s having a huge impact on our relationship despite the fact we have remained a united front on it. All three children have the exact same rules and boundaries from us. But I do worry that his behaviour (the 7 yr old) is learnt behaviour from his new home and if so I just don’t see how we can ever help it stop from only having them every other weekend and holidays, both boys are completely different children to how they were before the move and not in a nice way, it’s heartbreaking and I just need some advice but I cannot talk to anyone around me because the idea of talking negatively about my stepsons to people around us breaks my heart