When the Honeymoon Goes South (Joanne's response)

Yes, Rob is being thick right now -- giving him the benefit of the doubt, perhaps the stresses of the day have dulled his sensitivity about how money talks impact Celia.  If Rob continues to be thick, he will argue with Celia about why she shouldn't be upset about the things he has said, but this is beside the point when the disconnect has already occurred.  The task now is to reconnect, and this requires two steps for Rob (regardless of whether he figures out for himself what is going on or Celia has to tell him):  a) acknowledge the cause of the disconnect ("It upset you when I talked about money") and b) attempt to repair ("I'm sorry I did that during our honeymoon dinner.  I know we need to plan ahead on money talks").  Then, it takes patience for the reconnect -- it won't necessarily happen immediately.  

As I have written here many times, relationships go through a constant cycle of connect-disconnect-reconnect to greater or lesser degrees.  Often the feeling of disconnect occurs because one partner misses the other and says or does something that inadvertently hurts them, as Rob in his own post-coital haze has done.  All couples disconnect at times.  Struggling couples do not know how to reconnect.  Healthy, resilient couples understand what reconnection requires, and they do it willingly.