Thank you all so very much for all this wonderful advice.
It is clear I have a lot to keep thinking about and keep watching the situation.
I don't want to wreck the friendship or the bond that I am picking up for the kids for sure.
I will take it slow and keep an eye on things. Given the choice I would rather be friends without sex than have it all fall apart. But once we go down the road to a point there will be no putting it back in the box.
So again, thank you.