My DP and I have been together for over two years and he has a daughter from a previous relationship who is now 5yrs old. Throughout our whole relationship his ex partner has done nothing push negative attitudes and beliefs onto his daughter to an extent where she tells his daughter that I am a bad person, and that she does not like me. It has gone so far as when i fell pregnant with my first I was not allowed to be anywhere near her as it would it away and the ex was constantly telling my DP that his daughter will have nothing to do with her step-sibling, my son is now 5wks old and my DP's ex has decided that its ok for them to meet, but in saying that she still wants her daughter to have nothing to do with me. I can understand why she would feel threatened and uncomfortable with the idea but she has known about it from the start and has had more than enough time to address the issues she has with me. Both my partner and I are very careful what we say and do around his ex because if she is angry or unhappy she prevents him from spending time with his daughter. At this stage he only gets to see her every other weekend and even then its only for a few hours. He is a devoted parent and each time he is unable to see his daughter it breaks his heart and mine. All he wants is to spend a weekend, full days or half with his whole family, with his children and at the moment he is unable to do so.
Any ideas on how I can make this happen or address the situation with his ex? As I believe that his daughter and his son should be able to get to know each other and grow up together.