You need to go back and re-read your 1:11am post. THAT is where you need to get back to, and NOT in the crap exchanging moral-equivalency, oh-please-make-me-feel-better-about-my-infidelity TMs with your wayward wife.
It's not your job to rescue her from her own conscience. "Never rescue an adulteress from the consequences of her infidelity."
It IS, however, your job to use every resource at your disposal, financially, legally, emotionally and spiritually, to protect yourself and your son, and to fight for your family.
Let your wife twist in the wind. Focus on your son, and your legal plan right now.