I know you are and will, but enjoy your son. It sounds like you are having a blast with him, he will always remember the times you guys have together - keep it up.
As for detaching.....Sorry I'm going to pull out a 2x4. Your still too attached. You are worrying constantly what is on your W's mind. Stop....You cannot try to figure her out it will drive you nuts and will eventual cause you to backslide big time. You are nolonger snooping, great job. But you are always talking about contact with the OM, is she calling him is she not. Your not snooping so you do not know, again good, even if she is you cannot stop her, she needs to end it on her own. Try not to worry about what she is thinking or what she is up to. You love your W dearly, I can tell from your posts, stop worrying about her and love her from a far. Sorry if I am being a little harsh, but I did the samethings for a while and it did not help me or my sitch. Now I can really give a rats a$$ about what my W is doing or thinking. Strangely even though we are going through a D she is talking to me more, actually opening up a little. To be honest she finally seems to see the reality of it all. It is probably to late for me, but I do not think that it is for you. DETACH...Keep GALing....
You are a great guy, Dad, and if your W would ever wake up she would see that you are a great H.