Just wanted to make a comment about the concept of standing in your sitch.
Standing is for situations where a formerly good spouse of long standing has gone temporarily MLC crazy. Standing is about honoring the past years of good marriage while waiting for a good spouse to recover from their temporary insanity.
BUT - your sitch may not be one of those where that is wise. You've only been together 3 years. In my experience, someone who cheats so soon into a marriage, usually has issues that run way deeper than MLC. You may not be able to see it now, but odds are good that he has some much deeper issue - personality disorder of some kind, or perhaps something else.
Try reading The Sociopath Next Door and see if any of it seems familiar.
Whatever you do, just focus on you and your child and getting your own life together. If he comes around and realizes his mistake - and you decide he's worth taking back - you can make that decision at that time. But don't put ANYTHING in your life on hold waiting for him. As hard as it may be to believe - he may have seemed perfect and charming early in the relationship - the odds that there is some serious underlying pathology there are very high.
