This will be a hard time for your H. Many slip and contact, it takes a lot of willpower to keep away from the OP.
If he is committed to NC, he will be depressed, angry, sad etc.. Expect the worst will be over in a month or two. Likely, he will still miss her to a degree for many months. During this time, as hard as it is, stay positive, and don't express anger in front of him over how he feels- save that for here.
Will your husband get his feeling back for you? Without the OW in the picture, I would say yes- so long as you are meeting his most important emotional needs consistently. If, however, there is intermittent contact with the OW, then you will make no progress.
