Mach said it better than me but right now your son has to be your number one priority. Trust me I understand your anger. My W was so cold to our kids when we told them I was shocked. She left house within 15 minutes of telling them and D7 was still crying her eyes out. I had to suck it up and clean up the mess. Held both kids for well over an hour as D7 cried and they both asked hard questions because they were so confused, their world was just taken from them and their mom acted like she could care less. I never said a bad thing about my W and continue to build her up in front of kids. No matter how bad I'm hurting I won't show my kids. I am their rock right now and you know what, we've become even closer through this and our bond is stronger than ever. Neither kid is afraid to ask me anything and they know I will answer their questions. Just as important is the kids still have a good R with their mom and haven't brought up anything negative in a long time.
I'm from a D'd home and when I was little I had no one to ask questions to or that made me feel safe and I still remember those feelings. No matter how angry or hurt you are, don't let your son have those kinds of feelings.
Personality is who the world sees, character is who you are