if he was sure that it was over, he could have moved the money long ago. or Tuesday, if Monday sealed the deal.
Money is a "safe" topic. he can call and speak to you without justification b/c you have this joint acct. So just be perky. Pretend that Monday didn't happen as best that you can. Stop worrying about OW. I know it sucks, but there is nothing that you can do other than be a great person yourself. And we all know that you are a great person, the thing is projecting it, so that your H gets reminded.