Rehearsal Dinner Dilema

So originally, my FMIL was supposed to pay for the limos, which I thought was her responsibility, however, she backed out...I'm also under the impression that she's supposed to host the rehearsal dinner, as my FH, myself and my parents are paying for everything else...who should be the one to tell her that she better start looking for places or whatever...it's such a sensitive thing and I know she's gonna pull the I can't swing it card, but it's just too much for us since we're doing everything else, is it really wrong to want her to do what she should be doing to begin with? I feel like FH is gonna jump to her defense and say, no she really can't, but I'm not asking for a lot, it's June, even a simple BBQ at the house would be fine, my parents and his mom are so not on the same page and things get really tense really fast, and I don't want this to turn into a big thing that's gonna carry over to the actual wedding...... I feel like no matter what, I'm not gonna win, ugh!!!!!! HELP!!!!!!

Yikes! Sorry Jenna! The Grooms parents are supposed to pay or host the RD.
That ***** that she backed out! I think Guy should have a talk with her about it.