Bright, I'm sorry your thoughts are all over the place, but it's understandable after being around people you both know and enjoy interacting with.
About him visiting w/his family, many of the MLCers will become close to their family members once they are further along in crisis. It's that "going back to the fold" to revisit family life once more and try to recapture their youth. For example, my xh wasn't as close to his mother and even less so w/his brother, but once he left, it was like he became attached to the hip with both of them. It was the strangest thing. Another example of crazy making behavior, my xh really didn't like his job and took no interest in the outside activities that he could have participated in that his job offered. Behold! Once he left, he lived and breathed that job and still does. Why? Because it's the only thing he has in his life that is from the past and now into the future.
What I'm trying to say is that each case is different, but many of the elements are the same. The family ties are the ones that always interest me because they may have been either distant or somewhat distant w/family members, but they sure do change those dynamics once the crisis hits.
As for visiting w/your son, that may come later. If he follows the pattern of doing the opposite of returning to earth from leaving it previously, you and your son will be the last reconnections that take place. It could be a while before this happens, if it happens.
I know this stuff is frustrating and you want answers, but there is no rhyme or reason for what they do. You can analyze the situation until pigs fly, but the answers won't be there because it's so off the wall. One minute you think you've got it all figured out and the next minute, it's changed up again. That's why we emphasize not to over analyze because it will drive you crazy.
Continue moving forward and keep the focus on you. Okay?