Mako you may want to go take a look at my thread. My H went from fine to EA to PA to the A dead and over in 4 months. And was fully on board and back in the MR 4 months after that. He had some touch and go while he worked his own sh!t out. He himself admitted that lock down had been a huge factor in reevaluating me, our MR and why he blew our MR up. I imagine a condensed version of that with absolutely quarantine is possible.
I would just warn like LH has that even if she thinks she's all in today doesn't mean she'll still think she's all in tomorrow. She may waffle for a while. She may keep you at arms length until she figures it out. And by figure it out I mean that in the sense that it could go either way. It took my H longer to decided that he wanted back into the MR than it did for him to decide to sleep with someone else. You'll have to decide if you want to be in that position for as long as it take for her to figure it out. Due to Covid I didn't have much of a choice in the matter, but as weather warmed and house and apartment walk throughs were allowed again I decided he had until fall to p!ss or get off the pot. That might be something to consider while you process this.