I'm sorry you find yourself here and it sounds like you've gotten some great advice. As you know, DB is about working on yourself and doing what works. Make Stuart the best guy possible and perhaps save your R. There are no guarantees except death and taxes.
I'm no expert and only have this to say. Obviously, you can only work on you. However, if your wife suffers from an ED, (and I actually started battling this at age 6 in the 2nd grade- I was way ahead of my time:-), there are ongoing, underlying issues that are always there. This doesn't give you a pass or the opp to say it's all her. However, most people with EDs are rather complex in how they see themselves, how others see them, and this can thoroughly complicate Rs. I realize humans are complex in general again, EDs add an extra layer. We want to control something in out lives.
Focus on yourself and your child. Become the person you want. Good luck!
3 kids BD 12/15/13 (IDKIILY. ) Rope dropped Cirque du Soleil style D final 9-9-14 "Some people are born on 3rd base and go through life thinking they hit a triple." Barry Switzer