Bridal Shower drama-need advice

So my MOH is also my mom, good decision in the moment bad decison in long run.. but besides that, so my FMIL who i love love love, wants to help my mom plan my bridal shower and since my mom is still kinda sick she needs the help. FMIL priced out some places and called my mom today to tell her what she found. My mother said that its too much $ and she doesn't have it. No suggestions, and when she asked her what her budget is she said i dont know.. My mom likes a lot of drama, and now shes mad at me and I'm put in such a weird position... I'm not doing it at our house, the summer is to hot and we don't have a/c if it was to rain...
I don't know if my mom as the mother of the bride is supposed to pay for the restraunt? and then the girls split everything else? am i right?
If thats the case should i just put in the $ for my mom's half, and just call it a day- shes not really happy about that, she wants all the girls to pay for it.. and they can't do that it would cost to much. Sorry so long but what do I do??

Hmmm....I've never paid for a shower. Usually the mother of the bride throws the entire shower for the bride. At least that's what all my friends have done ????? Not sure if the 'American' tradition is different.

Sometimes the groom's mom pays half..depending on the money situation.