If what the alleged male AP says Chris told him is true, that he really felt verbally and emotionally abused by Shanann and didn't know how to get out of the marriage, then trying for another baby and succeeding in doing so is a special sort of stupid in my book. If he truly felt that way then the last thing he would do is trap himself further by having another child. Then engage in other affairs while telling his newly pregnant wife over and over he wanted to separate.
Also, a thought on the reports of Chris being depressed and sad over what people are thinking of him now...IMHO, the "people" he his referring to are his current and past APs.
It's interesting (if true) that there is a common theme of him blaming SW for everything, including his own lying to the AP.