My wife said something interesting on our weekend away after a girls night out. She said there is still this little kernel of doubt about me transitioning in the future.
There was nothing about the weekend or anything to drive that thought. She admitted that she knows I claim to be certain, but she has that creeping doubt that at 70 or 80 I will want to transition. I can state with certainty that a transition will never happen. We talk about my cross dressing openly and as often as the topic comes up spontaneously and I have stated to her the "no transition" fact numerous times. So it is interesting that there is still a lingering doubt. Do keep in mind that she doesn't lose sleep over this or anything but it surprised me none-the-less.
So, my advice to all who have a wife/SO who knows, don't assume she is 100% on the non-transition understanding. And continually reassure her that you KNOW you will always be her husband. She may always have lingering doubt but keep up the conversation.