If the A has ended there will be a withdrawal process. It's like a junkie getting off his drugs. There may be some backsliding on her part, but if her minds made up then the backslides may not last long. If you've loved someone and then have to let them go it's hard to do. See it from her perspective. Not that you should share that with her. And during this withdrawal period she may go through many mood swings. It'll be a rollercoaster ride for her, like it's been for you. Yes, stay the course. If she comes to you and says the A is over and there's NC with OM forever, then you can tentatively start the process of rebuilding trust. I highly recommend continuing with MC for that if it gets to that point. I really think the email reply had the desired effect. Way to go!
M: 59 W: 53 M: 9 yrs T: 14 yrs No kids together but D30(hers), S27, S24, D21(all 3 mine) W moved out 11/18/2013 D-Day 12/14/2013 W moved back home 12/1/2014