Also, Tod, you need to step up and be a man and control the household. Tell her how you feel, after all communication is the key to a relationship, and it seems to me that you have no channels of communication with your wife anymore. Tell her firstly that you do not like her spending, tell her you are worried about your childrens future and your future and that it could be affected by the constant spending she does. Tell her that if she wants to spend money like she does then she needs to contribute as well. A marrige is a partnership but by the sounds of it you are doing most of the work. I have always believed that a relationship is 50/50 and give and take. You are giving and she is taking, and not giving back. It's unfair.
You need to decide what you want as well. Do you want to be in an unhappy relationship anymore? If not, then you need to step up and do something about it.

. I dont think I really need to ask though.
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