Well, "daddy" should have talked to you about it before he told your son.
I agree with how you want to tell your son - if will simply be telling him the truth and there is nothing wrong with the truth. Like FOB said, I'd rather be the bad guy than have my son get hurt.
As far as disappointments, simply put....he'll get over it. I've learned that kids are very resiliant. Learning and dealing with disappointments is a fact of life and will help him in the future.
You are a good mom
