whoops, missed page two. Your concerns are totally valid and I feel the exact same way as you do about not wanting my old marriage back, even if my W were to reach out. I think the fact you acknowledge that and are standing firm on it is huge. As Maika said, I can easily imagine some LBS's jumping all over such a 'positive sign' and basically throwing themselves off a cliff. Make no mistake, there is lots of work to do and much of it will be required from her. So, she needs to actually be ready and committed to do that.
But for now, your approach seems solid. Tread very carefully and take your time testing out how serious she is. And I'll reiterate what Maika said, have no expectations.
M: 26 W: 26 M: 1.5 T: 3 No kids BD: 31 March 2018
W's affair began: 23 March 2018 Affair confirmed: 18 April 2018 Confrontation/claims she ended A: 14 May 2018 Ended in-house separation: July 2018