This. You've had months or even years to come to terms with this and make your plans . She hasn’t.
I know you left before but it’s clear from you post that she spent that month desperately hoping that you would come back . So of course she is going to be shocked and devastated.
Im sure that she is carrying on as normal this morning because she is trying to be brave and keep it all together. Not because she is ignoring you. Would you rather than she was lying on the floor screaming and crying or sitting on the sofa knocking back the gin? Or were you expecting her to be packing for you ?
Perhaps you are hoping that she will agree that it’s over so that you can tell everyone that it’s mutual? I don’t know .
Please take the excellent advice you’ve had on this and your other thread.
Pack your stuff and move out.
Take responsibility for your own actions and tell your family and friends that you’ve decided to leave . Then your wife can get the support and help she needs.
Accept that not everyone in your social circle will agree with your actions.
Get legal advice immediately and try to divorce as quickly and amincably as possible. Listen hard when you lawyer explains what is a matrimonial asset. Don’t try to hide these or lie about them.
Accept that the starting point for division of assets is 50:50 and you won’t get more because you have earned more ( as most men have ). The court will consider other contributions to your long marriage as just as valid. Fighting about this will make everything worse and cost more so don’t do it.
If you happen to meet a new partner next week / month , please be as discrete as you can for the months to come. Don’t post on social media or attend public functions with your new woman or expect your children ( if you have any ) to meet her until next summer at the earliest. I’m not saying don’t date - I’m saying don’t rub it in everyone’s faces and expect them to like it.
Don’t expect all of your own family to dump your wife immediately. Remember that she has been in their family for the last 30 years and they may have a relationship with her that’s independent of you. Allow then to make their own choices as adults.