In my most humble of opinions, I wouldn’t recommend you message him back.
1. His OW pressuring him - not your problem to fix. Why should you bend over and make things easier for the woman breaking into your family? He can put his big boy pants on and deal with her himself.
2. Do you think it will help if you re-state your position? ie How likely is it you’ll send a message explaining again what your ObGYN said and then your husband will say “oh yeah, I understand your point now - that makes sense!” …. I’ll tell you, it ain’t going to happen. Nothing you say will change his mind. So why bother?
If you are absolutely determined to reply which I wouldn’t, then “I feel I’ve made my position quite clear.”
