No from me too. She knows your stance. Restating it by the MC will only get her back up even more. I'm no vet, though.

Agree letter about reopening communication being in the best interest of kids may be ok

R 25 years
M 14 years
S11 & S13
Working on it alone since Oct 2014
M in trouble a lot earlier (~2 years)
Feb 2016. 1st R chat in a yr.
Next R chat Aug'17
Still together