Child support

I just got married 3 weeks ago.  My husband has 2 kids from his previous marriage and he spends an arm and a leg in child support.  I am fully for child support being a child of divorced parents but he barely takes anything him in his paycheck.  We want to start a family of our own, we live in NJ and I'm not sure what the legality is when he has children with another woman.  I don't expect him to stop paying child support for his other kids but how will he support ours with all his money going to them?  I feel like the courts can't just forget about my children?  I just want to know if anyone knows how this would go? I've googled but I don't get real good answers.  Thanks!!