I admire you for telling your W and children how you feel. I have had similar convos with my children. Mine went along the lines of they wanted me to know that they were happy for me to date if I wanted to. I am still officially M and so they know that whilst that state remains I will not date. It is not right (IMO) and they have seen enough bad examples from thier father without me adding to it.
My wedding ring has been on and off over the last 2 years especially recently. Now it is off permanently. With all that H has said and done in the last few weeks I do not feel he is worthy of me wearing it. I'd like to think that will change in the future but the realist in me knows better.
I have many friends who have used 'artificial' means e.g. dating websites to find a new partner. It's not for me. For one I don't think I would feel safe going on a blind date and for another I belive that if I meant to find a new partner God will lead them to me (or me to them).
Unless you find a new partner I wouldn't mention this to your children again. I suspect your son left his mum out of his prayers b/c he thought that is what you wanted. I'm glad you showed him otherwise. This is a confusing time for adults never mind children and I know you will continue to protect yours as much as possible.
FWIW I think you need to drop the rope a little more with your W. Yes let her be part of the children's lives if that is what she wants but I wouldn't mention anything about your own personal life from here on in unless she asks. You don't want her to feel like you are goading her (I know you aren't) and you certainly don't want her coming back out of pity.
Make the rest of your DB journey about saving MMF. You deserve to give yourself that.
Me 43 XH 45 M 2.7.88 Divorce 7.10.09 Kids D20,S17 & D15