I applaud your desire to support your wife. Your love for her is evident.
That having been said, I agree with the support group's observation that you're treading over the line from support to control and codependance. Don't worry, I get it! I've been in both your shoes and her shoes (except for the part where there was surgery. No surgery to date =D).
My partner and I recently ran into this same wall as I have been in a binge/volume eating uptick, and he has watched me gain 65 pounds since we started dating. He doesn't mind the weight so much, but it kills him to hear me crying about it, or become suddenly sad when the topic of weight arises. He tried to help, same way as you are. I started to feel judged and controlled, and that only made me push back harder. I started to eat not in spite of, but out of spite. After a couple of arguments over it, we sat down and had a frank conversation about my needs, his needs and what it means to support.
Here's what we came up with, and it's been working for our relationship:
1) My eating disorder and food addictions are my problem, not his. He didn't cause it, he can't cure it, and he can't control it (sound familiar CODA & Al-Anon peeps?)
2) Focusing on the food only plays into the addiction/obsession. It makes food the centeral theme of the discussion, which makes food the central theme of my thought patterns, and thinking about food makes me head-hungry and makes me act out (read: overeat) more. So instead, I ask him to focus the dicussion/reminders/etc on the underlying emotional reasons why I eat. Please see #3 below.
3) It hurts him to see me in pain. He wants to support me, and I want his support - emotional support. Here's the breakdown of what that means in practical, real work application:
When he sees me engage in binging behavior, rather than pointing out the food intake and its detrimental effects, or the fact that it breaks rules, I've asked him to offer his emotional support for the underlying reason for the binge.
For example; I inhale my food very, very quickly when I binge. It is like a race against time, and I am trying to eat everything I can before the meal ends. It is like I believe every meal is the last meal I might see for months, like a bear preparing for hybernation. The underlying emotional reason: I fear deprivation. I had a history of childhood poverty, neglect and abuse, and the binging part of me fears that I will be suddenly lose all access to food. Weird and illogical, yes, but that's why it's called a disorder. So, what I've asked him to do if he sees me in that state is to give me some physical comfort - a hug, a squeeze of the hand, a caress on the back. This creates a tactile distraction from the binge state, and in that moment, he can kiss me and tell me that there will be plenty still here if I want more later, or that nothing and no one is going to take my food away from me. It's going to be OK. I've asked him to never say "slow down," "no need to rush," etc, as those are instructional in nature and feel controlling. However, the reminders that everything is going to be OK and I'm not going to be deprived today are reassurances and therefore supportive. They also manage to hit the binge trigger at its heart and snap me out of it.
There are probably more that I can't remember off of the top of my head as it's been a couple of months since this has been a problem for us, but I am happy to post more as I remember them. Good luck to you & your wife. =)
Somayeh
Defining success by behaviors, feelings and NSVs!