Please understand that my reply is not meant to sound cold or judgemental, but the plain simple truth is that this is what you face when you choose to be involved with a man with children with other women. I understand that the two of you are engaged and that this is his ex, but that doesn't change the fact that you are making a fully informed decision to become involved in a very complicated situation. If, as you say, you are going to have to be the one supporting your family and you are not willing to do this you need to make that decision now and leave the situation before the two of you are married -- which will only complicate it for all of you further if you are, in fact, unwilling to commit to such financial difficulties (and believe me that would be understandable.) You need to look at the whole picture very honestly and decide what you are/aren't willing to do and decide from there whether this is truly the right situation for you or not. As the other posters have tried to explain, the two children that you are bringing into this are considered to be your and your ex's responsibility to support and will hold no bearing on your fiancees financial evaluation when it comes to determining support for his child. I know that this may not seem fair to you, but it is the way that the law works and actually makes perfect sense if you think about it. What you and your fiancee need to discuss is what he intends to do - as far as changing jobs or taking a second - to be able to meet not only his support obligation to the child but also to be able to meet his obligation to contribute to the support of your family.
