Hang onto your hope Sammy.
It's a good thing to have during this time. Whether you R or D you need the hope that your future will be wonderful and you will find your way.
I would walk slowly and follow your gut. It took a lot for him to call your dad and to confess to everyone.
I don't agree with him telling the kids he doesn't know if you will let him fix things, IMO thats putting the blame on you should you decide to D. I would let him know discussions with the kids need to be done together and with a plan.
You don't have to decide anything today. You do owe it to yourself to continue with your healing, so do that. See the atty, know your rights.
Get strong inside and out and let him do the same. If further down the road you want to continue, you take the next step. Let him do the lifting right now, let him continue to provide you with the actions which will ultimately make your decision to R or S/D easier to make.
Just watch....actions not words.