I think the trust needs to be rebuilt. I may be wrong, but I think part of "recovery" is becoming more honest and upfront about your feelings, activities and such. They need to learn to be accountable to thier actions and doings. So if a person were in recovery, I would think (and please correct me if I am wrong) that the addict would be less devious and upfront about things. That over time will show you things are in fact what they appear to be and the trust would be re-established. Just my 2 cents...but I have little experience with this stuff.