Mozza - Mediation was hard for me too. All aspects are difficult with the kids and finances being the worst. I understand your points about her family's financial wellbeing. I would guess that if you try to explain that to the mediator and her, you will be out numbered and the thinking would be frowned upon. I think speaking to the L would be your best bet.
Me: 32 W: 29 T:8 M: 6 D4 S2 M - 8/2008 W is not happy - 1/2014 W wants D - 9/2014 W moved out - 11/2014 D filed - 1/23/2015 D'ed - 2/25/2015 Gave X the Letter - 11/10/2015