I replied to your question on my thread. I think your son was ready for the truth and he came to the person that he knew would/could tell him. You did fine. Let him know that he can always come to you if he has more questions and that everything that you do is out of love for them and their mother.

kat

Me-53(and learning!)
S24, S21, D18, D17
Just keep swimming, Just keep swimming. Dory