so sorry to hear i am not here to preach or tell you what to do but i do want to share and hopefully you will have fate...
i did not have a child but i did have the lack of finances to acheive any sort of fair rebuttle (sp ) my X took my savings and put it into stocks (which i did not have access to...little did i know he had done that) anyway after our divorce i was struggling to get by and WAITING for the money he had promised (haha niave me!!!) it was not that much but it was enough to fill the fridge, give me a little sense of pride and pay my parents back for money i had borrowed to get an apartment...so i went to a lawyer (a good one) and explained my situation...he said i was in a win - win situation!!! something they could garnish his wages for now, because he was a "good" lawyer his price was high (but not too high!) i was able to get the money, pay my parents back, fill up my pantry, get a 1 year membership to the local gym (i NEEDED some relief!) AND get an old bike of mine tuned up and spit shined!!!! and the lawyer got his share...

i do not know your full situation and it sounds like he has quite support in mommy dearest...but hold your head up high and DO try to find a good lawyer who is on your side all the way!!! ***they do exist!!! we are stronger than we we think and you will come out of this a better person if you keep your priorities straight...

good luck and hugs......