You know what's strange??

The boys and I are driving home together last night and out of the blue Sam says, "Mom, you know what's strange to me?"

me: "No, what's strange to you?"
Sam: "When dad (my ex) kisses Whit (his new girlfriend)."
me: "Why is that strange?"
Sam: "Cause it is."
me: "oh. ok."

I realize my kiddos are going to have to deal with a LOT of things that are strange because of the divorce... and I don't know how to prepare them for it. :(