Sandi replied when I was typing. She is great. I am glad you have her on your team.
As for the silent treatment and then the olive branch in form of s smoothie, I imagine she does not know how to act/what to think. She must have a world of thoughts and emotions swirling in her head. This is difficult for her too. Forget about blame for the moment and understand what she is going through.This is not forgiving nor forgetting, it is putting that aside for the moment.
Be strong. And it is an exercise in futility to try to understand everything she does/thinks. Try to understand but know normal logic no longer applies. Hence refocusing on YOU is more useful.
R 25 years M 14 years S11 & S13 Working on it alone since Oct 2014 M in trouble a lot earlier (~2 years) Feb 2016. 1st R chat in a yr. Next R chat Aug'17 Still together