Great job sorting out financials and schedule regarding co-parenting your son. That is just something that needs to happen ASAP, and that will make it way easier for you down the road.
Regarding the R talk. Heres my personal experience and advice.
My ex disregarded me as dirt the second she jumped ship, because there was another ship to board. I suddenly didn't mean anything, and never had - typical logic and whatever.
Heres the deal, whenever she became insecure about wether the new ship was sinking or not, she would reach out and talk about break, R, and possible future plans together. That was going on, because I let it. Because I was weak, and didn't realize, that she was just treading waters, because the OM didn't know what he wanted. It never was about me, and if it ever becomes about me again, then that will be years down the road.
Your wife is screaming the word insecure, and you are, despite everything, her harbour where she finds shelter for the storms. But that is definitely not alright, because she fired you.
Validate her by all means, but do not get drawn into anything, because this is about her own selfish agenda, and not about you. Sorry to be so straight forward.
Detach, lovingly, but detach - and for gods sake, trust nothing she does. The second a new ship enters the horizon, she will sink you.
BD: Wife says "its over" 11th august 2018. EA: June 2018 PA: August 2018 - ongoing Status: Taking turns 7 days a week to be in the house w. kids WW: no regrets, seems happy with leaving.