good job, but I would have preferred that you first ASK him -- "Did she contact you?" -- to see if he tells you the truth. That's what I had recommended. It sounds like you just went in, guns a-blazing, and accused him of the contact. Or am I misunderstanding this?
I don't think there's ANYTHING wrong with intel -- you're merely protecting yourself! But I do think you need to give your husband the benefit of the doubt, so to speak, and SEE if he will "come clean" with you when there is contact.